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Finding the Fourth Proportional to 77,251.50, 115,929.18 and 27,331.40

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Solution

The fourth proportional to 77,251.50, 115,929.18 and 27,331.40 is: 41,015.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,251.50 : 115,929.18 = 27,331.40 : x
  2. Step 2: Convert to fraction form
    77,251.50/115,929.18 = 27,331.40/x
  3. Step 3: Cross multiply
    77,251.50x = 115,929.18 × 27,331.40
  4. Step 4: Simplify right side
    77,251.50x = 3,168,506,790.25
  5. Step 5: Solve for x
    x = 3,168,506,790.25/77,251.50
  6. Step 6: Final answer
    x = 41,015.47

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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.