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Finding the Fourth Proportional to 79,531.68, 109,753.68 and 43,724

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Solution

The fourth proportional to 79,531.68, 109,753.68 and 43,724 is: 60,339.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,531.68 : 109,753.68 = 43,724 : x
  2. Step 2: Convert to fraction form
    79,531.68/109,753.68 = 43,724/x
  3. Step 3: Cross multiply
    79,531.68x = 109,753.68 × 43,724
  4. Step 4: Simplify right side
    79,531.68x = 4,798,869,904.32
  5. Step 5: Solve for x
    x = 4,798,869,904.32/79,531.68
  6. Step 6: Final answer
    x = 60,339.10

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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.