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Finding the Fourth Proportional to 71,486.84, 98,655.08 and 39,655.78

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Solution

The fourth proportional to 71,486.84, 98,655.08 and 39,655.78 is: 54,726.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,486.84 : 98,655.08 = 39,655.78 : x
  2. Step 2: Convert to fraction form
    71,486.84/98,655.08 = 39,655.78/x
  3. Step 3: Cross multiply
    71,486.84x = 98,655.08 × 39,655.78
  4. Step 4: Simplify right side
    71,486.84x = 3,912,243,703.45
  5. Step 5: Solve for x
    x = 3,912,243,703.45/71,486.84
  6. Step 6: Final answer
    x = 54,726.77

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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.