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Finding the Fourth Proportional to 60,657.60, 90,889.20 and 38,431.20

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Solution

The fourth proportional to 60,657.60, 90,889.20 and 38,431.20 is: 57,585.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    60,657.60 : 90,889.20 = 38,431.20 : x
  2. Step 2: Convert to fraction form
    60,657.60/90,889.20 = 38,431.20/x
  3. Step 3: Cross multiply
    60,657.60x = 90,889.20 × 38,431.20
  4. Step 4: Simplify right side
    60,657.60x = 3,492,981,023.04
  5. Step 5: Solve for x
    x = 3,492,981,023.04/60,657.60
  6. Step 6: Final answer
    x = 57,585.22

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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.