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Finding the Fourth Proportional to 137,040.60, 189,117.43 and 76,614.60

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Solution

The fourth proportional to 137,040.60, 189,117.43 and 76,614.60 is: 105,728.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    137,040.60 : 189,117.43 = 76,614.60 : x
  2. Step 2: Convert to fraction form
    137,040.60/189,117.43 = 76,614.60/x
  3. Step 3: Cross multiply
    137,040.60x = 189,117.43 × 76,614.60
  4. Step 4: Simplify right side
    137,040.60x = 14,489,155,115.35
  5. Step 5: Solve for x
    x = 14,489,155,115.35/137,040.60
  6. Step 6: Final answer
    x = 105,728.93

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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.