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Finding the Fourth Proportional to 134,559.56, 185,687.34 and 77,960

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Solution

The fourth proportional to 134,559.56, 185,687.34 and 77,960 is: 107,581.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    134,559.56 : 185,687.34 = 77,960 : x
  2. Step 2: Convert to fraction form
    134,559.56/185,687.34 = 77,960/x
  3. Step 3: Cross multiply
    134,559.56x = 185,687.34 × 77,960
  4. Step 4: Simplify right side
    134,559.56x = 14,476,185,026.40
  5. Step 5: Solve for x
    x = 14,476,185,026.40/134,559.56
  6. Step 6: Final answer
    x = 107,581.99

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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.