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Finding the Fourth Proportional to 72,503.88, 108,751.50 and 43,108.80

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Solution

The fourth proportional to 72,503.88, 108,751.50 and 43,108.80 is: 64,660.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,503.88 : 108,751.50 = 43,108.80 : x
  2. Step 2: Convert to fraction form
    72,503.88/108,751.50 = 43,108.80/x
  3. Step 3: Cross multiply
    72,503.88x = 108,751.50 × 43,108.80
  4. Step 4: Simplify right side
    72,503.88x = 4,688,146,663.20
  5. Step 5: Solve for x
    x = 4,688,146,663.20/72,503.88
  6. Step 6: Final answer
    x = 64,660.63

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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.