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Finding the Fourth Proportional to 155,972.60, 234,039.90 and 72,866.60

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Solution

The fourth proportional to 155,972.60, 234,039.90 and 72,866.60 is: 109,337.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    155,972.60 : 234,039.90 = 72,866.60 : x
  2. Step 2: Convert to fraction form
    155,972.60/234,039.90 = 72,866.60/x
  3. Step 3: Cross multiply
    155,972.60x = 234,039.90 × 72,866.60
  4. Step 4: Simplify right side
    155,972.60x = 17,053,691,777.34
  5. Step 5: Solve for x
    x = 17,053,691,777.34/155,972.60
  6. Step 6: Final answer
    x = 109,337.74

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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.