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Finding the Fourth Proportional to 89,813.61, 134,720.42 and 61,648.26

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Solution

The fourth proportional to 89,813.61, 134,720.42 and 61,648.26 is: 92,472.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    89,813.61 : 134,720.42 = 61,648.26 : x
  2. Step 2: Convert to fraction form
    89,813.61/134,720.42 = 61,648.26/x
  3. Step 3: Cross multiply
    89,813.61x = 134,720.42 × 61,648.26
  4. Step 4: Simplify right side
    89,813.61x = 8,305,278,666.03
  5. Step 5: Solve for x
    x = 8,305,278,666.03/89,813.61
  6. Step 6: Final answer
    x = 92,472.38

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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.