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Finding the Fourth Proportional to 79,115.70, 118,612.80 and 39,701.10

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Solution

The fourth proportional to 79,115.70, 118,612.80 and 39,701.10 is: 59,521.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,115.70 : 118,612.80 = 39,701.10 : x
  2. Step 2: Convert to fraction form
    79,115.70/118,612.80 = 39,701.10/x
  3. Step 3: Cross multiply
    79,115.70x = 118,612.80 × 39,701.10
  4. Step 4: Simplify right side
    79,115.70x = 4,709,058,634.08
  5. Step 5: Solve for x
    x = 4,709,058,634.08/79,115.70
  6. Step 6: Final answer
    x = 59,521.17

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.