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Finding the Fourth Proportional to 128,477.29, 192,734.45 and 39,737.71

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Solution

The fourth proportional to 128,477.29, 192,734.45 and 39,737.71 is: 59,612.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,477.29 : 192,734.45 = 39,737.71 : x
  2. Step 2: Convert to fraction form
    128,477.29/192,734.45 = 39,737.71/x
  3. Step 3: Cross multiply
    128,477.29x = 192,734.45 × 39,737.71
  4. Step 4: Simplify right side
    128,477.29x = 7,658,825,681.11
  5. Step 5: Solve for x
    x = 7,658,825,681.11/128,477.29
  6. Step 6: Final answer
    x = 59,612.29

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.