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Finding the Fourth Proportional to 92,310.75, 137,741.58 and 86,668.29

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Solution

The fourth proportional to 92,310.75, 137,741.58 and 86,668.29 is: 129,322.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    92,310.75 : 137,741.58 = 86,668.29 : x
  2. Step 2: Convert to fraction form
    92,310.75/137,741.58 = 86,668.29/x
  3. Step 3: Cross multiply
    92,310.75x = 137,741.58 × 86,668.29
  4. Step 4: Simplify right side
    92,310.75x = 11,937,827,200.50
  5. Step 5: Solve for x
    x = 11,937,827,200.50/92,310.75
  6. Step 6: Final answer
    x = 129,322.18

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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.