Home / 90,905.40-136,358.10-28,575.90

Finding the Fourth Proportional to 90,905.40, 136,358.10 and 28,575.90

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Solution

The fourth proportional to 90,905.40, 136,358.10 and 28,575.90 is: 42,863.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,905.40 : 136,358.10 = 28,575.90 : x
  2. Step 2: Convert to fraction form
    90,905.40/136,358.10 = 28,575.90/x
  3. Step 3: Cross multiply
    90,905.40x = 136,358.10 × 28,575.90
  4. Step 4: Simplify right side
    90,905.40x = 3,896,555,429.79
  5. Step 5: Solve for x
    x = 3,896,555,429.79/90,905.40
  6. Step 6: Final answer
    x = 42,863.85

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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.