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Finding the Fourth Proportional to 79,638.88, 109,909.02 and 43,836.16

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Solution

The fourth proportional to 79,638.88, 109,909.02 and 43,836.16 is: 60,497.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,638.88 : 109,909.02 = 43,836.16 : x
  2. Step 2: Convert to fraction form
    79,638.88/109,909.02 = 43,836.16/x
  3. Step 3: Cross multiply
    79,638.88x = 109,909.02 × 43,836.16
  4. Step 4: Simplify right side
    79,638.88x = 4,817,989,386.16
  5. Step 5: Solve for x
    x = 4,817,989,386.16/79,638.88
  6. Step 6: Final answer
    x = 60,497.96

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1.5x scale

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.