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Finding the Fourth Proportional to 81,101.79, 111,920.94 and 45,294.93

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Solution

The fourth proportional to 81,101.79, 111,920.94 and 45,294.93 is: 62,507.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,101.79 : 111,920.94 = 45,294.93 : x
  2. Step 2: Convert to fraction form
    81,101.79/111,920.94 = 45,294.93/x
  3. Step 3: Cross multiply
    81,101.79x = 111,920.94 × 45,294.93
  4. Step 4: Simplify right side
    81,101.79x = 5,069,451,142.83
  5. Step 5: Solve for x
    x = 5,069,451,142.83/81,101.79
  6. Step 6: Final answer
    x = 62,507.27

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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.