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Finding the Fourth Proportional to 80,672.40, 120,889.80 and 58,532.40

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Solution

The fourth proportional to 80,672.40, 120,889.80 and 58,532.40 is: 87,712.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,672.40 : 120,889.80 = 58,532.40 : x
  2. Step 2: Convert to fraction form
    80,672.40/120,889.80 = 58,532.40/x
  3. Step 3: Cross multiply
    80,672.40x = 120,889.80 × 58,532.40
  4. Step 4: Simplify right side
    80,672.40x = 7,075,970,129.52
  5. Step 5: Solve for x
    x = 7,075,970,129.52/80,672.40
  6. Step 6: Final answer
    x = 87,712.40

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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.