Home / 80,935.80-121,209.30-77,436.60

Finding the Fourth Proportional to 80,935.80, 121,209.30 and 77,436.60

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Solution

The fourth proportional to 80,935.80, 121,209.30 and 77,436.60 is: 115,968.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,935.80 : 121,209.30 = 77,436.60 : x
  2. Step 2: Convert to fraction form
    80,935.80/121,209.30 = 77,436.60/x
  3. Step 3: Cross multiply
    80,935.80x = 121,209.30 × 77,436.60
  4. Step 4: Simplify right side
    80,935.80x = 9,386,036,080.38
  5. Step 5: Solve for x
    x = 9,386,036,080.38/80,935.80
  6. Step 6: Final answer
    x = 115,968.90

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.