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Finding the Fourth Proportional to 71,982, 99,492.48 and 63,418.68

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Solution

The fourth proportional to 71,982, 99,492.48 and 63,418.68 is: 87,656.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,982 : 99,492.48 = 63,418.68 : x
  2. Step 2: Convert to fraction form
    71,982/99,492.48 = 63,418.68/x
  3. Step 3: Cross multiply
    71,982x = 99,492.48 × 63,418.68
  4. Step 4: Simplify right side
    71,982x = 6,309,681,751.53
  5. Step 5: Solve for x
    x = 6,309,681,751.53/71,982
  6. Step 6: Final answer
    x = 87,656.38

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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.