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Finding the Fourth Proportional to 72,604.80, 108,761.40 and 48,985.20

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Solution

The fourth proportional to 72,604.80, 108,761.40 and 48,985.20 is: 73,379.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,604.80 : 108,761.40 = 48,985.20 : x
  2. Step 2: Convert to fraction form
    72,604.80/108,761.40 = 48,985.20/x
  3. Step 3: Cross multiply
    72,604.80x = 108,761.40 × 48,985.20
  4. Step 4: Simplify right side
    72,604.80x = 5,327,698,931.28
  5. Step 5: Solve for x
    x = 5,327,698,931.28/72,604.80
  6. Step 6: Final answer
    x = 73,379.43

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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.