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Finding the Fourth Proportional to 83,689.53, 115,490.12 and 45,963.51

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Solution

The fourth proportional to 83,689.53, 115,490.12 and 45,963.51 is: 63,428.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    83,689.53 : 115,490.12 = 45,963.51 : x
  2. Step 2: Convert to fraction form
    83,689.53/115,490.12 = 45,963.51/x
  3. Step 3: Cross multiply
    83,689.53x = 115,490.12 × 45,963.51
  4. Step 4: Simplify right side
    83,689.53x = 5,308,331,055.70
  5. Step 5: Solve for x
    x = 5,308,331,055.70/83,689.53
  6. Step 6: Final answer
    x = 63,428.85

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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.