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Finding the Fourth Proportional to 86,414.72, 129,397.76 and 74,014.56

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Solution

The fourth proportional to 86,414.72, 129,397.76 and 74,014.56 is: 110,829.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,414.72 : 129,397.76 = 74,014.56 : x
  2. Step 2: Convert to fraction form
    86,414.72/129,397.76 = 74,014.56/x
  3. Step 3: Cross multiply
    86,414.72x = 129,397.76 × 74,014.56
  4. Step 4: Simplify right side
    86,414.72x = 9,577,318,271.39
  5. Step 5: Solve for x
    x = 9,577,318,271.39/86,414.72
  6. Step 6: Final answer
    x = 110,829.71

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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.