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Finding the Fourth Proportional to 71,438.92, 98,360.76 and 54,388.42

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Solution

The fourth proportional to 71,438.92, 98,360.76 and 54,388.42 is: 74,884.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,438.92 : 98,360.76 = 54,388.42 : x
  2. Step 2: Convert to fraction form
    71,438.92/98,360.76 = 54,388.42/x
  3. Step 3: Cross multiply
    71,438.92x = 98,360.76 × 54,388.42
  4. Step 4: Simplify right side
    71,438.92x = 5,349,686,326.40
  5. Step 5: Solve for x
    x = 5,349,686,326.40/71,438.92
  6. Step 6: Final answer
    x = 74,884.76

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.