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Finding the Fourth Proportional to 98,261.61, 135,561.65 and 61,951.10

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Solution

The fourth proportional to 98,261.61, 135,561.65 and 61,951.10 is: 85,467.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    98,261.61 : 135,561.65 = 61,951.10 : x
  2. Step 2: Convert to fraction form
    98,261.61/135,561.65 = 61,951.10/x
  3. Step 3: Cross multiply
    98,261.61x = 135,561.65 × 61,951.10
  4. Step 4: Simplify right side
    98,261.61x = 8,398,193,840.03
  5. Step 5: Solve for x
    x = 8,398,193,840.03/98,261.61
  6. Step 6: Final answer
    x = 85,467.70

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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.