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Finding the Fourth Proportional to 83,689.66, 115,484.88 and 45,963.88

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Solution

The fourth proportional to 83,689.66, 115,484.88 and 45,963.88 is: 63,426.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    83,689.66 : 115,484.88 = 45,963.88 : x
  2. Step 2: Convert to fraction form
    83,689.66/115,484.88 = 45,963.88/x
  3. Step 3: Cross multiply
    83,689.66x = 115,484.88 × 45,963.88
  4. Step 4: Simplify right side
    83,689.66x = 5,308,133,166.13
  5. Step 5: Solve for x
    x = 5,308,133,166.13/83,689.66
  6. Step 6: Final answer
    x = 63,426.39

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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.