Home / 76,279.78-105,264.25-42,287.64

Finding the Fourth Proportional to 76,279.78, 105,264.25 and 42,287.64

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Solution

The fourth proportional to 76,279.78, 105,264.25 and 42,287.64 is: 58,355.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    76,279.78 : 105,264.25 = 42,287.64 : x
  2. Step 2: Convert to fraction form
    76,279.78/105,264.25 = 42,287.64/x
  3. Step 3: Cross multiply
    76,279.78x = 105,264.25 × 42,287.64
  4. Step 4: Simplify right side
    76,279.78x = 4,451,376,708.87
  5. Step 5: Solve for x
    x = 4,451,376,708.87/76,279.78
  6. Step 6: Final answer
    x = 58,355.92

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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.