Home / 81,876.39-112,988.30-47,908.23

Finding the Fourth Proportional to 81,876.39, 112,988.30 and 47,908.23

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Solution

The fourth proportional to 81,876.39, 112,988.30 and 47,908.23 is: 66,112.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,876.39 : 112,988.30 = 47,908.23 : x
  2. Step 2: Convert to fraction form
    81,876.39/112,988.30 = 47,908.23/x
  3. Step 3: Cross multiply
    81,876.39x = 112,988.30 × 47,908.23
  4. Step 4: Simplify right side
    81,876.39x = 5,413,069,224.17
  5. Step 5: Solve for x
    x = 5,413,069,224.17/81,876.39
  6. Step 6: Final answer
    x = 66,112.70

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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.