Home / 51,870.40-77,807.20-20,279.20

Finding the Fourth Proportional to 51,870.40, 77,807.20 and 20,279.20

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Solution

The fourth proportional to 51,870.40, 77,807.20 and 20,279.20 is: 30,419.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    51,870.40 : 77,807.20 = 20,279.20 : x
  2. Step 2: Convert to fraction form
    51,870.40/77,807.20 = 20,279.20/x
  3. Step 3: Cross multiply
    51,870.40x = 77,807.20 × 20,279.20
  4. Step 4: Simplify right side
    51,870.40x = 1,577,867,770.24
  5. Step 5: Solve for x
    x = 1,577,867,770.24/51,870.40
  6. Step 6: Final answer
    x = 30,419.43

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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.