Home / 83,886.20-115,724.80-49,875.40

Finding the Fourth Proportional to 83,886.20, 115,724.80 and 49,875.40

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Solution

The fourth proportional to 83,886.20, 115,724.80 and 49,875.40 is: 68,805.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    83,886.20 : 115,724.80 = 49,875.40 : x
  2. Step 2: Convert to fraction form
    83,886.20/115,724.80 = 49,875.40/x
  3. Step 3: Cross multiply
    83,886.20x = 115,724.80 × 49,875.40
  4. Step 4: Simplify right side
    83,886.20x = 5,771,820,689.92
  5. Step 5: Solve for x
    x = 5,771,820,689.92/83,886.20
  6. Step 6: Final answer
    x = 68,805.37

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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.