Home / 83,979.40-115,899.75-62,721.76

Finding the Fourth Proportional to 83,979.40, 115,899.75 and 62,721.76

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Solution

The fourth proportional to 83,979.40, 115,899.75 and 62,721.76 is: 86,562.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    83,979.40 : 115,899.75 = 62,721.76 : x
  2. Step 2: Convert to fraction form
    83,979.40/115,899.75 = 62,721.76/x
  3. Step 3: Cross multiply
    83,979.40x = 115,899.75 × 62,721.76
  4. Step 4: Simplify right side
    83,979.40x = 7,269,436,303.56
  5. Step 5: Solve for x
    x = 7,269,436,303.56/83,979.40
  6. Step 6: Final answer
    x = 86,562.14

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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.