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Finding the Fourth Proportional to 98,420.72, 135,770.73 and 64,486.04

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Solution

The fourth proportional to 98,420.72, 135,770.73 and 64,486.04 is: 88,958.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    98,420.72 : 135,770.73 = 64,486.04 : x
  2. Step 2: Convert to fraction form
    98,420.72/135,770.73 = 64,486.04/x
  3. Step 3: Cross multiply
    98,420.72x = 135,770.73 × 64,486.04
  4. Step 4: Simplify right side
    98,420.72x = 8,755,316,725.61
  5. Step 5: Solve for x
    x = 8,755,316,725.61/98,420.72
  6. Step 6: Final answer
    x = 88,958.06

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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.