Home / 65,027.20-89,721.60-38,171.20

Finding the Fourth Proportional to 65,027.20, 89,721.60 and 38,171.20

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Solution

The fourth proportional to 65,027.20, 89,721.60 and 38,171.20 is: 52,666.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,027.20 : 89,721.60 = 38,171.20 : x
  2. Step 2: Convert to fraction form
    65,027.20/89,721.60 = 38,171.20/x
  3. Step 3: Cross multiply
    65,027.20x = 89,721.60 × 38,171.20
  4. Step 4: Simplify right side
    65,027.20x = 3,424,781,137.92
  5. Step 5: Solve for x
    x = 3,424,781,137.92/65,027.20
  6. Step 6: Final answer
    x = 52,666.90

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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.