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Finding the Fourth Proportional to 86,209.80, 129,314.70 and 62,881.80

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Solution

The fourth proportional to 86,209.80, 129,314.70 and 62,881.80 is: 94,322.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,209.80 : 129,314.70 = 62,881.80 : x
  2. Step 2: Convert to fraction form
    86,209.80/129,314.70 = 62,881.80/x
  3. Step 3: Cross multiply
    86,209.80x = 129,314.70 × 62,881.80
  4. Step 4: Simplify right side
    86,209.80x = 8,131,541,102.46
  5. Step 5: Solve for x
    x = 8,131,541,102.46/86,209.80
  6. Step 6: Final answer
    x = 94,322.70

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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.