Home / 76,335.28-105,370.76-57,439.60

Finding the Fourth Proportional to 76,335.28, 105,370.76 and 57,439.60

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Solution

The fourth proportional to 76,335.28, 105,370.76 and 57,439.60 is: 79,287.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    76,335.28 : 105,370.76 = 57,439.60 : x
  2. Step 2: Convert to fraction form
    76,335.28/105,370.76 = 57,439.60/x
  3. Step 3: Cross multiply
    76,335.28x = 105,370.76 × 57,439.60
  4. Step 4: Simplify right side
    76,335.28x = 6,052,454,306.10
  5. Step 5: Solve for x
    x = 6,052,454,306.10/76,335.28
  6. Step 6: Final answer
    x = 79,287.77

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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.