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Finding the Fourth Proportional to 65,217.64, 90,021.80 and 38,359

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Solution

The fourth proportional to 65,217.64, 90,021.80 and 38,359 is: 52,948.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,217.64 : 90,021.80 = 38,359 : x
  2. Step 2: Convert to fraction form
    65,217.64/90,021.80 = 38,359/x
  3. Step 3: Cross multiply
    65,217.64x = 90,021.80 × 38,359
  4. Step 4: Simplify right side
    65,217.64x = 3,453,146,226.20
  5. Step 5: Solve for x
    x = 3,453,146,226.20/65,217.64
  6. Step 6: Final answer
    x = 52,948.04

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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.