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Finding the Fourth Proportional to 78,133.38, 117,184.28 and 21,976.08

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Solution

The fourth proportional to 78,133.38, 117,184.28 and 21,976.08 is: 32,959.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,133.38 : 117,184.28 = 21,976.08 : x
  2. Step 2: Convert to fraction form
    78,133.38/117,184.28 = 21,976.08/x
  3. Step 3: Cross multiply
    78,133.38x = 117,184.28 × 21,976.08
  4. Step 4: Simplify right side
    78,133.38x = 2,575,251,705.96
  5. Step 5: Solve for x
    x = 2,575,251,705.96/78,133.38
  6. Step 6: Final answer
    x = 32,959.68

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1.5x scale

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.