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Finding the Fourth Proportional to 92,718.38, 138,812.70 and 86,833.10

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Solution

The fourth proportional to 92,718.38, 138,812.70 and 86,833.10 is: 130,001.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    92,718.38 : 138,812.70 = 86,833.10 : x
  2. Step 2: Convert to fraction form
    92,718.38/138,812.70 = 86,833.10/x
  3. Step 3: Cross multiply
    92,718.38x = 138,812.70 × 86,833.10
  4. Step 4: Simplify right side
    92,718.38x = 12,053,537,060.37
  5. Step 5: Solve for x
    x = 12,053,537,060.37/92,718.38
  6. Step 6: Final answer
    x = 130,001.59

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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.