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Finding the Fourth Proportional to 1,225,973,873.10, 1,692,807,922.26 and 987,060,139.50

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Solution

The fourth proportional to 1,225,973,873.10, 1,692,807,922.26 and 987,060,139.50 is: 1,362,919,113.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,225,973,873.10 : 1,692,807,922.26 = 987,060,139.50 : x
  2. Step 2: Convert to fraction form
    1,225,973,873.10/1,692,807,922.26 = 987,060,139.50/x
  3. Step 3: Cross multiply
    1,225,973,873.10x = 1,692,807,922.26 × 987,060,139.50
  4. Step 4: Simplify right side
    1,225,973,873.10x = 1,670,903,223,892,660,736
  5. Step 5: Solve for x
    x = 1,670,903,223,892,660,736/1,225,973,873.10
  6. Step 6: Final answer
    x = 1,362,919,113.17

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.