Home / 90,686.16-135,951.48-31,484.88

Finding the Fourth Proportional to 90,686.16, 135,951.48 and 31,484.88

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Solution

The fourth proportional to 90,686.16, 135,951.48 and 31,484.88 is: 47,200.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,686.16 : 135,951.48 = 31,484.88 : x
  2. Step 2: Convert to fraction form
    90,686.16/135,951.48 = 31,484.88/x
  3. Step 3: Cross multiply
    90,686.16x = 135,951.48 × 31,484.88
  4. Step 4: Simplify right side
    90,686.16x = 4,280,416,033.62
  5. Step 5: Solve for x
    x = 4,280,416,033.62/90,686.16
  6. Step 6: Final answer
    x = 47,200.32

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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.