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Finding the Fourth Proportional to 128,545.92, 192,081.96 and 97,981.92

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Solution

The fourth proportional to 128,545.92, 192,081.96 and 97,981.92 is: 146,411.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,545.92 : 192,081.96 = 97,981.92 : x
  2. Step 2: Convert to fraction form
    128,545.92/192,081.96 = 97,981.92/x
  3. Step 3: Cross multiply
    128,545.92x = 192,081.96 × 97,981.92
  4. Step 4: Simplify right side
    128,545.92x = 18,820,559,238.16
  5. Step 5: Solve for x
    x = 18,820,559,238.16/128,545.92
  6. Step 6: Final answer
    x = 146,411.18

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.