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Finding the Fourth Proportional to 75,279.20, 103,624.56 and 65,065.57

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Solution

The fourth proportional to 75,279.20, 103,624.56 and 65,065.57 is: 89,565.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    75,279.20 : 103,624.56 = 65,065.57 : x
  2. Step 2: Convert to fraction form
    75,279.20/103,624.56 = 65,065.57/x
  3. Step 3: Cross multiply
    75,279.20x = 103,624.56 × 65,065.57
  4. Step 4: Simplify right side
    75,279.20x = 6,742,391,062.40
  5. Step 5: Solve for x
    x = 6,742,391,062.40/75,279.20
  6. Step 6: Final answer
    x = 89,565.13

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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.