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Finding the Fourth Proportional to 122,760.88, 169,349.98 and 74,931.20

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Solution

The fourth proportional to 122,760.88, 169,349.98 and 74,931.20 is: 103,368.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    122,760.88 : 169,349.98 = 74,931.20 : x
  2. Step 2: Convert to fraction form
    122,760.88/169,349.98 = 74,931.20/x
  3. Step 3: Cross multiply
    122,760.88x = 169,349.98 × 74,931.20
  4. Step 4: Simplify right side
    122,760.88x = 12,689,597,221.38
  5. Step 5: Solve for x
    x = 12,689,597,221.38/122,760.88
  6. Step 6: Final answer
    x = 103,368.41

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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.