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Finding the Fourth Proportional to 98,269.90, 135,612.92 and 55,830.76

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Solution

The fourth proportional to 98,269.90, 135,612.92 and 55,830.76 is: 77,046.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    98,269.90 : 135,612.92 = 55,830.76 : x
  2. Step 2: Convert to fraction form
    98,269.90/135,612.92 = 55,830.76/x
  3. Step 3: Cross multiply
    98,269.90x = 135,612.92 × 55,830.76
  4. Step 4: Simplify right side
    98,269.90x = 7,571,372,389.42
  5. Step 5: Solve for x
    x = 7,571,372,389.42/98,269.90
  6. Step 6: Final answer
    x = 77,046.71

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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.