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Finding the Fourth Proportional to 77,278.53, 106,643.13 and 43,286.94

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Solution

The fourth proportional to 77,278.53, 106,643.13 and 43,286.94 is: 59,735.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,278.53 : 106,643.13 = 43,286.94 : x
  2. Step 2: Convert to fraction form
    77,278.53/106,643.13 = 43,286.94/x
  3. Step 3: Cross multiply
    77,278.53x = 106,643.13 × 43,286.94
  4. Step 4: Simplify right side
    77,278.53x = 4,616,254,769.72
  5. Step 5: Solve for x
    x = 4,616,254,769.72/77,278.53
  6. Step 6: Final answer
    x = 59,735.28

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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.