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Finding the Fourth Proportional to 128,141.56, 176,826.54 and 71,545.24

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Solution

The fourth proportional to 128,141.56, 176,826.54 and 71,545.24 is: 98,727.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,141.56 : 176,826.54 = 71,545.24 : x
  2. Step 2: Convert to fraction form
    128,141.56/176,826.54 = 71,545.24/x
  3. Step 3: Cross multiply
    128,141.56x = 176,826.54 × 71,545.24
  4. Step 4: Simplify right side
    128,141.56x = 12,651,097,242.67
  5. Step 5: Solve for x
    x = 12,651,097,242.67/128,141.56
  6. Step 6: Final answer
    x = 98,727.51

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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.