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Finding the Fourth Proportional to 83,705.78, 115,513.62 and 45,979.22

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Solution

The fourth proportional to 83,705.78, 115,513.62 and 45,979.22 is: 63,451.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    83,705.78 : 115,513.62 = 45,979.22 : x
  2. Step 2: Convert to fraction form
    83,705.78/115,513.62 = 45,979.22/x
  3. Step 3: Cross multiply
    83,705.78x = 115,513.62 × 45,979.22
  4. Step 4: Simplify right side
    83,705.78x = 5,311,226,146.98
  5. Step 5: Solve for x
    x = 5,311,226,146.98/83,705.78
  6. Step 6: Final answer
    x = 63,451.13

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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.