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Finding the Fourth Proportional to 128,045.16, 176,686.02 and 71,458.92

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Solution

The fourth proportional to 128,045.16, 176,686.02 and 71,458.92 is: 98,604.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,045.16 : 176,686.02 = 71,458.92 : x
  2. Step 2: Convert to fraction form
    128,045.16/176,686.02 = 71,458.92/x
  3. Step 3: Cross multiply
    128,045.16x = 176,686.02 × 71,458.92
  4. Step 4: Simplify right side
    128,045.16x = 12,625,792,168.30
  5. Step 5: Solve for x
    x = 12,625,792,168.30/128,045.16
  6. Step 6: Final answer
    x = 98,604.21

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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.