Home / 83,390.16-115,067.88-66,437.40

Finding the Fourth Proportional to 83,390.16, 115,067.88 and 66,437.40

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Solution

The fourth proportional to 83,390.16, 115,067.88 and 66,437.40 is: 91,675.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    83,390.16 : 115,067.88 = 66,437.40 : x
  2. Step 2: Convert to fraction form
    83,390.16/115,067.88 = 66,437.40/x
  3. Step 3: Cross multiply
    83,390.16x = 115,067.88 × 66,437.40
  4. Step 4: Simplify right side
    83,390.16x = 7,644,810,770.71
  5. Step 5: Solve for x
    x = 7,644,810,770.71/83,390.16
  6. Step 6: Final answer
    x = 91,675.21

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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.