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Finding the Fourth Proportional to 92,040.30, 138,060.45 and 91,457.10

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Solution

The fourth proportional to 92,040.30, 138,060.45 and 91,457.10 is: 137,185.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    92,040.30 : 138,060.45 = 91,457.10 : x
  2. Step 2: Convert to fraction form
    92,040.30/138,060.45 = 91,457.10/x
  3. Step 3: Cross multiply
    92,040.30x = 138,060.45 × 91,457.10
  4. Step 4: Simplify right side
    92,040.30x = 12,626,608,381.70
  5. Step 5: Solve for x
    x = 12,626,608,381.70/92,040.30
  6. Step 6: Final answer
    x = 137,185.65

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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.