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Finding the Fourth Proportional to 72,469.84, 100,002.36 and 40,634.32

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Solution

The fourth proportional to 72,469.84, 100,002.36 and 40,634.32 is: 56,071.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,469.84 : 100,002.36 = 40,634.32 : x
  2. Step 2: Convert to fraction form
    72,469.84/100,002.36 = 40,634.32/x
  3. Step 3: Cross multiply
    72,469.84x = 100,002.36 × 40,634.32
  4. Step 4: Simplify right side
    72,469.84x = 4,063,527,897.00
  5. Step 5: Solve for x
    x = 4,063,527,897.00/72,469.84
  6. Step 6: Final answer
    x = 56,071.99

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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.