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Finding the Fourth Proportional to 136,088, 187,802.40 and 76,472

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Solution

The fourth proportional to 136,088, 187,802.40 and 76,472 is: 105,531.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,088 : 187,802.40 = 76,472 : x
  2. Step 2: Convert to fraction form
    136,088/187,802.40 = 76,472/x
  3. Step 3: Cross multiply
    136,088x = 187,802.40 × 76,472
  4. Step 4: Simplify right side
    136,088x = 14,361,625,132.80
  5. Step 5: Solve for x
    x = 14,361,625,132.80/136,088
  6. Step 6: Final answer
    x = 105,531.90

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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.