Home / 83,387.16-115,063.74-66,434.40

Finding the Fourth Proportional to 83,387.16, 115,063.74 and 66,434.40

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Solution

The fourth proportional to 83,387.16, 115,063.74 and 66,434.40 is: 91,671.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    83,387.16 : 115,063.74 = 66,434.40 : x
  2. Step 2: Convert to fraction form
    83,387.16/115,063.74 = 66,434.40/x
  3. Step 3: Cross multiply
    83,387.16x = 115,063.74 × 66,434.40
  4. Step 4: Simplify right side
    83,387.16x = 7,644,190,528.66
  5. Step 5: Solve for x
    x = 7,644,190,528.66/83,387.16
  6. Step 6: Final answer
    x = 91,671.07

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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.