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Finding the Fourth Proportional to 61,144.70, 91,717.05 and 42,117.80

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Solution

The fourth proportional to 61,144.70, 91,717.05 and 42,117.80 is: 63,176.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,144.70 : 91,717.05 = 42,117.80 : x
  2. Step 2: Convert to fraction form
    61,144.70/91,717.05 = 42,117.80/x
  3. Step 3: Cross multiply
    61,144.70x = 91,717.05 × 42,117.80
  4. Step 4: Simplify right side
    61,144.70x = 3,862,920,368.49
  5. Step 5: Solve for x
    x = 3,862,920,368.49/61,144.70
  6. Step 6: Final answer
    x = 63,176.70

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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.