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Finding the Fourth Proportional to 137,559.84, 189,844.08 and 77,129.52

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Solution

The fourth proportional to 137,559.84, 189,844.08 and 77,129.52 is: 106,445.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    137,559.84 : 189,844.08 = 77,129.52 : x
  2. Step 2: Convert to fraction form
    137,559.84/189,844.08 = 77,129.52/x
  3. Step 3: Cross multiply
    137,559.84x = 189,844.08 × 77,129.52
  4. Step 4: Simplify right side
    137,559.84x = 14,642,582,765.24
  5. Step 5: Solve for x
    x = 14,642,582,765.24/137,559.84
  6. Step 6: Final answer
    x = 106,445.19

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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.