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Finding the Fourth Proportional to 81,098.76, 111,911.65 and 48,430.04

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Solution

The fourth proportional to 81,098.76, 111,911.65 and 48,430.04 is: 66,830.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,098.76 : 111,911.65 = 48,430.04 : x
  2. Step 2: Convert to fraction form
    81,098.76/111,911.65 = 48,430.04/x
  3. Step 3: Cross multiply
    81,098.76x = 111,911.65 × 48,430.04
  4. Step 4: Simplify right side
    81,098.76x = 5,419,885,443.82
  5. Step 5: Solve for x
    x = 5,419,885,443.82/81,098.76
  6. Step 6: Final answer
    x = 66,830.68

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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.