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Finding the Fourth Proportional to 71,289.91, 98,373.45 and 42,603.90

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Solution

The fourth proportional to 71,289.91, 98,373.45 and 42,603.90 is: 58,789.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,289.91 : 98,373.45 = 42,603.90 : x
  2. Step 2: Convert to fraction form
    71,289.91/98,373.45 = 42,603.90/x
  3. Step 3: Cross multiply
    71,289.91x = 98,373.45 × 42,603.90
  4. Step 4: Simplify right side
    71,289.91x = 4,191,092,626.46
  5. Step 5: Solve for x
    x = 4,191,092,626.46/71,289.91
  6. Step 6: Final answer
    x = 58,789.42

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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.