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Finding the Fourth Proportional to 72,469.63, 99,957.50 and 70,031.12

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Solution

The fourth proportional to 72,469.63, 99,957.50 and 70,031.12 is: 96,594.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,469.63 : 99,957.50 = 70,031.12 : x
  2. Step 2: Convert to fraction form
    72,469.63/99,957.50 = 70,031.12/x
  3. Step 3: Cross multiply
    72,469.63x = 99,957.50 × 70,031.12
  4. Step 4: Simplify right side
    72,469.63x = 7,000,135,577.14
  5. Step 5: Solve for x
    x = 7,000,135,577.14/72,469.63
  6. Step 6: Final answer
    x = 96,594.06

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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.