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Finding the Fourth Proportional to 98,257.32, 135,581.42 and 55,230.72

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Solution

The fourth proportional to 98,257.32, 135,581.42 and 55,230.72 is: 76,210.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    98,257.32 : 135,581.42 = 55,230.72 : x
  2. Step 2: Convert to fraction form
    98,257.32/135,581.42 = 55,230.72/x
  3. Step 3: Cross multiply
    98,257.32x = 135,581.42 × 55,230.72
  4. Step 4: Simplify right side
    98,257.32x = 7,488,259,445.22
  5. Step 5: Solve for x
    x = 7,488,259,445.22/98,257.32
  6. Step 6: Final answer
    x = 76,210.70

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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.