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Finding the Fourth Proportional to 81,113.67, 111,929.58 and 45,298.71

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Solution

The fourth proportional to 81,113.67, 111,929.58 and 45,298.71 is: 62,508.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,113.67 : 111,929.58 = 45,298.71 : x
  2. Step 2: Convert to fraction form
    81,113.67/111,929.58 = 45,298.71/x
  3. Step 3: Cross multiply
    81,113.67x = 111,929.58 × 45,298.71
  4. Step 4: Simplify right side
    81,113.67x = 5,070,265,584.84
  5. Step 5: Solve for x
    x = 5,070,265,584.84/81,113.67
  6. Step 6: Final answer
    x = 62,508.15

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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.