Home / 85,364.20-128,046.30-38,708.20

Finding the Fourth Proportional to 85,364.20, 128,046.30 and 38,708.20

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Solution

The fourth proportional to 85,364.20, 128,046.30 and 38,708.20 is: 58,062.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,364.20 : 128,046.30 = 38,708.20 : x
  2. Step 2: Convert to fraction form
    85,364.20/128,046.30 = 38,708.20/x
  3. Step 3: Cross multiply
    85,364.20x = 128,046.30 × 38,708.20
  4. Step 4: Simplify right side
    85,364.20x = 4,956,441,789.66
  5. Step 5: Solve for x
    x = 4,956,441,789.66/85,364.20
  6. Step 6: Final answer
    x = 58,062.30

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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.