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Finding the Fourth Proportional to 72,443.20, 108,697.20 and 34,988.80

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Solution

The fourth proportional to 72,443.20, 108,697.20 and 34,988.80 is: 52,498.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,443.20 : 108,697.20 = 34,988.80 : x
  2. Step 2: Convert to fraction form
    72,443.20/108,697.20 = 34,988.80/x
  3. Step 3: Cross multiply
    72,443.20x = 108,697.20 × 34,988.80
  4. Step 4: Simplify right side
    72,443.20x = 3,803,184,591.36
  5. Step 5: Solve for x
    x = 3,803,184,591.36/72,443.20
  6. Step 6: Final answer
    x = 52,498.85

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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.