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Finding the Fourth Proportional to 142,337.20, 213,505.80 and 89,978.80

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Solution

The fourth proportional to 142,337.20, 213,505.80 and 89,978.80 is: 134,968.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,337.20 : 213,505.80 = 89,978.80 : x
  2. Step 2: Convert to fraction form
    142,337.20/213,505.80 = 89,978.80/x
  3. Step 3: Cross multiply
    142,337.20x = 213,505.80 × 89,978.80
  4. Step 4: Simplify right side
    142,337.20x = 19,210,995,677.04
  5. Step 5: Solve for x
    x = 19,210,995,677.04/142,337.20
  6. Step 6: Final answer
    x = 134,968.20

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1.5x scale

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.