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Finding the Fourth Proportional to 123,391.80, 185,087.70 and 89,566.20

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Solution

The fourth proportional to 123,391.80, 185,087.70 and 89,566.20 is: 134,349.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,391.80 : 185,087.70 = 89,566.20 : x
  2. Step 2: Convert to fraction form
    123,391.80/185,087.70 = 89,566.20/x
  3. Step 3: Cross multiply
    123,391.80x = 185,087.70 × 89,566.20
  4. Step 4: Simplify right side
    123,391.80x = 16,577,601,955.74
  5. Step 5: Solve for x
    x = 16,577,601,955.74/123,391.80
  6. Step 6: Final answer
    x = 134,349.30

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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.