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Finding the Fourth Proportional to 61,908, 85,434.56 and 38,021.12

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Solution

The fourth proportional to 61,908, 85,434.56 and 38,021.12 is: 52,470.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,908 : 85,434.56 = 38,021.12 : x
  2. Step 2: Convert to fraction form
    61,908/85,434.56 = 38,021.12/x
  3. Step 3: Cross multiply
    61,908x = 85,434.56 × 38,021.12
  4. Step 4: Simplify right side
    61,908x = 3,248,317,657.91
  5. Step 5: Solve for x
    x = 3,248,317,657.91/61,908
  6. Step 6: Final answer
    x = 52,470.08

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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.