Home / 52,276.80-78,434.40-21,115.20

Finding the Fourth Proportional to 52,276.80, 78,434.40 and 21,115.20

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Solution

The fourth proportional to 52,276.80, 78,434.40 and 21,115.20 is: 31,680.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    52,276.80 : 78,434.40 = 21,115.20 : x
  2. Step 2: Convert to fraction form
    52,276.80/78,434.40 = 21,115.20/x
  3. Step 3: Cross multiply
    52,276.80x = 78,434.40 × 21,115.20
  4. Step 4: Simplify right side
    52,276.80x = 1,656,158,042.88
  5. Step 5: Solve for x
    x = 1,656,158,042.88/52,276.80
  6. Step 6: Final answer
    x = 31,680.56

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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.