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Finding the Fourth Proportional to 127,712.71, 191,569.12 and 52,750.47

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Solution

The fourth proportional to 127,712.71, 191,569.12 and 52,750.47 is: 79,125.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    127,712.71 : 191,569.12 = 52,750.47 : x
  2. Step 2: Convert to fraction form
    127,712.71/191,569.12 = 52,750.47/x
  3. Step 3: Cross multiply
    127,712.71x = 191,569.12 × 52,750.47
  4. Step 4: Simplify right side
    127,712.71x = 10,105,361,703.99
  5. Step 5: Solve for x
    x = 10,105,361,703.99/127,712.71
  6. Step 6: Final answer
    x = 79,125.73

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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.