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Finding the Fourth Proportional to 61,752.81, 85,151.21 and 40,202.79

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Solution

The fourth proportional to 61,752.81, 85,151.21 and 40,202.79 is: 55,435.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,752.81 : 85,151.21 = 40,202.79 : x
  2. Step 2: Convert to fraction form
    61,752.81/85,151.21 = 40,202.79/x
  3. Step 3: Cross multiply
    61,752.81x = 85,151.21 × 40,202.79
  4. Step 4: Simplify right side
    61,752.81x = 3,423,316,012.86
  5. Step 5: Solve for x
    x = 3,423,316,012.86/61,752.81
  6. Step 6: Final answer
    x = 55,435.79

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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.