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Finding the Fourth Proportional to 81,657.90, 112,693.46 and 45,363.49

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Solution

The fourth proportional to 81,657.90, 112,693.46 and 45,363.49 is: 62,604.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,657.90 : 112,693.46 = 45,363.49 : x
  2. Step 2: Convert to fraction form
    81,657.90/112,693.46 = 45,363.49/x
  3. Step 3: Cross multiply
    81,657.90x = 112,693.46 × 45,363.49
  4. Step 4: Simplify right side
    81,657.90x = 5,112,168,645.78
  5. Step 5: Solve for x
    x = 5,112,168,645.78/81,657.90
  6. Step 6: Final answer
    x = 62,604.70

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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.