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Finding the Fourth Proportional to 128,115.23, 176,799.02 and 71,526.60

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Solution

The fourth proportional to 128,115.23, 176,799.02 and 71,526.60 is: 98,706.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,115.23 : 176,799.02 = 71,526.60 : x
  2. Step 2: Convert to fraction form
    128,115.23/176,799.02 = 71,526.60/x
  3. Step 3: Cross multiply
    128,115.23x = 176,799.02 × 71,526.60
  4. Step 4: Simplify right side
    128,115.23x = 12,645,832,426.30
  5. Step 5: Solve for x
    x = 12,645,832,426.30/128,115.23
  6. Step 6: Final answer
    x = 98,706.71

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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.