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Finding the Fourth Proportional to 125,790.88, 173,663.08 and 83,406.72

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Solution

The fourth proportional to 125,790.88, 173,663.08 and 83,406.72 is: 115,148.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    125,790.88 : 173,663.08 = 83,406.72 : x
  2. Step 2: Convert to fraction form
    125,790.88/173,663.08 = 83,406.72/x
  3. Step 3: Cross multiply
    125,790.88x = 173,663.08 × 83,406.72
  4. Step 4: Simplify right side
    125,790.88x = 14,484,667,887.90
  5. Step 5: Solve for x
    x = 14,484,667,887.90/125,790.88
  6. Step 6: Final answer
    x = 115,148.79

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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.