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Finding the Fourth Proportional to 72,469.88, 99,957.85 and 70,031.38

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Solution

The fourth proportional to 72,469.88, 99,957.85 and 70,031.38 is: 96,594.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,469.88 : 99,957.85 = 70,031.38 : x
  2. Step 2: Convert to fraction form
    72,469.88/99,957.85 = 70,031.38/x
  3. Step 3: Cross multiply
    72,469.88x = 99,957.85 × 70,031.38
  4. Step 4: Simplify right side
    72,469.88x = 7,000,185,327.39
  5. Step 5: Solve for x
    x = 7,000,185,327.39/72,469.88
  6. Step 6: Final answer
    x = 96,594.41

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.