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Finding the Fourth Proportional to 72,842,562.90, 109,263,844.35 and 18,989,874.90

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Solution

The fourth proportional to 72,842,562.90, 109,263,844.35 and 18,989,874.90 is: 28,484,812.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,842,562.90 : 109,263,844.35 = 18,989,874.90 : x
  2. Step 2: Convert to fraction form
    72,842,562.90/109,263,844.35 = 18,989,874.90/x
  3. Step 3: Cross multiply
    72,842,562.90x = 109,263,844.35 × 18,989,874.90
  4. Step 4: Simplify right side
    72,842,562.90x = 2,074,906,735,299,571.50
  5. Step 5: Solve for x
    x = 2,074,906,735,299,571.50/72,842,562.90
  6. Step 6: Final answer
    x = 28,484,812.35

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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.