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Finding the Fourth Proportional to 86,543.55, 129,833.55 and 27,385.20

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Solution

The fourth proportional to 86,543.55, 129,833.55 and 27,385.20 is: 41,083.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,543.55 : 129,833.55 = 27,385.20 : x
  2. Step 2: Convert to fraction form
    86,543.55/129,833.55 = 27,385.20/x
  3. Step 3: Cross multiply
    86,543.55x = 129,833.55 × 27,385.20
  4. Step 4: Simplify right side
    86,543.55x = 3,555,517,733.46
  5. Step 5: Solve for x
    x = 3,555,517,733.46/86,543.55
  6. Step 6: Final answer
    x = 41,083.57

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1.5x scale

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.