Home / 65,490.85-90,389.19-38,631.76

Finding the Fourth Proportional to 65,490.85, 90,389.19 and 38,631.76

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Solution

The fourth proportional to 65,490.85, 90,389.19 and 38,631.76 is: 53,318.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,490.85 : 90,389.19 = 38,631.76 : x
  2. Step 2: Convert to fraction form
    65,490.85/90,389.19 = 38,631.76/x
  3. Step 3: Cross multiply
    65,490.85x = 90,389.19 × 38,631.76
  4. Step 4: Simplify right side
    65,490.85x = 3,491,893,494.67
  5. Step 5: Solve for x
    x = 3,491,893,494.67/65,490.85
  6. Step 6: Final answer
    x = 53,318.80

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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.