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Finding the Fourth Proportional to 155,315.20, 232,972.80 and 66,553.60

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Solution

The fourth proportional to 155,315.20, 232,972.80 and 66,553.60 is: 99,830.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    155,315.20 : 232,972.80 = 66,553.60 : x
  2. Step 2: Convert to fraction form
    155,315.20/232,972.80 = 66,553.60/x
  3. Step 3: Cross multiply
    155,315.20x = 232,972.80 × 66,553.60
  4. Step 4: Simplify right side
    155,315.20x = 15,505,178,542.08
  5. Step 5: Solve for x
    x = 15,505,178,542.08/155,315.20
  6. Step 6: Final answer
    x = 99,830.40

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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.