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Finding the Fourth Proportional to 80,703.80, 121,055.70 and 70,854.20

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Solution

The fourth proportional to 80,703.80, 121,055.70 and 70,854.20 is: 106,281.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,703.80 : 121,055.70 = 70,854.20 : x
  2. Step 2: Convert to fraction form
    80,703.80/121,055.70 = 70,854.20/x
  3. Step 3: Cross multiply
    80,703.80x = 121,055.70 × 70,854.20
  4. Step 4: Simplify right side
    80,703.80x = 8,577,304,778.94
  5. Step 5: Solve for x
    x = 8,577,304,778.94/80,703.80
  6. Step 6: Final answer
    x = 106,281.30

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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.