Home / 77,381.20-116,104.60-42,279.85

Finding the Fourth Proportional to 77,381.20, 116,104.60 and 42,279.85

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Solution

The fourth proportional to 77,381.20, 116,104.60 and 42,279.85 is: 63,437.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,381.20 : 116,104.60 = 42,279.85 : x
  2. Step 2: Convert to fraction form
    77,381.20/116,104.60 = 42,279.85/x
  3. Step 3: Cross multiply
    77,381.20x = 116,104.60 × 42,279.85
  4. Step 4: Simplify right side
    77,381.20x = 4,908,884,887.75
  5. Step 5: Solve for x
    x = 4,908,884,887.75/77,381.20
  6. Step 6: Final answer
    x = 63,437.70

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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.