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Finding the Fourth Proportional to 83,691.15, 115,493.41 and 45,450.40

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Solution

The fourth proportional to 83,691.15, 115,493.41 and 45,450.40 is: 62,721.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    83,691.15 : 115,493.41 = 45,450.40 : x
  2. Step 2: Convert to fraction form
    83,691.15/115,493.41 = 45,450.40/x
  3. Step 3: Cross multiply
    83,691.15x = 115,493.41 × 45,450.40
  4. Step 4: Simplify right side
    83,691.15x = 5,249,221,104.40
  5. Step 5: Solve for x
    x = 5,249,221,104.40/83,691.15
  6. Step 6: Final answer
    x = 62,721.34

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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.