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Finding the Fourth Proportional to 150,406.61, 207,561.13 and 89,979.80

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Solution

The fourth proportional to 150,406.61, 207,561.13 and 89,979.80 is: 124,172.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    150,406.61 : 207,561.13 = 89,979.80 : x
  2. Step 2: Convert to fraction form
    150,406.61/207,561.13 = 89,979.80/x
  3. Step 3: Cross multiply
    150,406.61x = 207,561.13 × 89,979.80
  4. Step 4: Simplify right side
    150,406.61x = 18,676,307,702.42
  5. Step 5: Solve for x
    x = 18,676,307,702.42/150,406.61
  6. Step 6: Final answer
    x = 124,172.12

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.