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Finding the Fourth Proportional to 77,073.47, 115,619.46 and 27,143.24

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Solution

The fourth proportional to 77,073.47, 115,619.46 and 27,143.24 is: 40,718.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,073.47 : 115,619.46 = 27,143.24 : x
  2. Step 2: Convert to fraction form
    77,073.47/115,619.46 = 27,143.24/x
  3. Step 3: Cross multiply
    77,073.47x = 115,619.46 × 27,143.24
  4. Step 4: Simplify right side
    77,073.47x = 3,138,286,751.45
  5. Step 5: Solve for x
    x = 3,138,286,751.45/77,073.47
  6. Step 6: Final answer
    x = 40,718.12

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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.