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Finding the Fourth Proportional to 72,909,974.20, 109,364,961.30 and 72,909,974.20

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Solution

The fourth proportional to 72,909,974.20, 109,364,961.30 and 72,909,974.20 is: 109,364,961.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,909,974.20 : 109,364,961.30 = 72,909,974.20 : x
  2. Step 2: Convert to fraction form
    72,909,974.20/109,364,961.30 = 72,909,974.20/x
  3. Step 3: Cross multiply
    72,909,974.20x = 109,364,961.30 × 72,909,974.20
  4. Step 4: Simplify right side
    72,909,974.20x = 7,973,796,506,766,999
  5. Step 5: Solve for x
    x = 7,973,796,506,766,999/72,909,974.20
  6. Step 6: Final answer
    x = 109,364,961.30

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.