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Finding the Fourth Proportional to 61,899.38, 85,440.59 and 39,543.38

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Solution

The fourth proportional to 61,899.38, 85,440.59 and 39,543.38 is: 54,582.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,899.38 : 85,440.59 = 39,543.38 : x
  2. Step 2: Convert to fraction form
    61,899.38/85,440.59 = 39,543.38/x
  3. Step 3: Cross multiply
    61,899.38x = 85,440.59 × 39,543.38
  4. Step 4: Simplify right side
    61,899.38x = 3,378,609,092.87
  5. Step 5: Solve for x
    x = 3,378,609,092.87/61,899.38
  6. Step 6: Final answer
    x = 54,582.28

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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.