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Finding the Fourth Proportional to 65,483.53, 90,378.11 and 38,632.61

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Solution

The fourth proportional to 65,483.53, 90,378.11 and 38,632.61 is: 53,319.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,483.53 : 90,378.11 = 38,632.61 : x
  2. Step 2: Convert to fraction form
    65,483.53/90,378.11 = 38,632.61/x
  3. Step 3: Cross multiply
    65,483.53x = 90,378.11 × 38,632.61
  4. Step 4: Simplify right side
    65,483.53x = 3,491,542,276.17
  5. Step 5: Solve for x
    x = 3,491,542,276.17/65,483.53
  6. Step 6: Final answer
    x = 53,319.40

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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.