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Finding the Fourth Proportional to 71,739.84, 99,000.52 and 39,476.43

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Solution

The fourth proportional to 71,739.84, 99,000.52 and 39,476.43 is: 54,477.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,739.84 : 99,000.52 = 39,476.43 : x
  2. Step 2: Convert to fraction form
    71,739.84/99,000.52 = 39,476.43/x
  3. Step 3: Cross multiply
    71,739.84x = 99,000.52 × 39,476.43
  4. Step 4: Simplify right side
    71,739.84x = 3,908,186,900.36
  5. Step 5: Solve for x
    x = 3,908,186,900.36/71,739.84
  6. Step 6: Final answer
    x = 54,477.22

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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.