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Finding the Fourth Proportional to 125,838.58, 173,661.31 and 72,133.76

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Solution

The fourth proportional to 125,838.58, 173,661.31 and 72,133.76 is: 99,546.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    125,838.58 : 173,661.31 = 72,133.76 : x
  2. Step 2: Convert to fraction form
    125,838.58/173,661.31 = 72,133.76/x
  3. Step 3: Cross multiply
    125,838.58x = 173,661.31 × 72,133.76
  4. Step 4: Simplify right side
    125,838.58x = 12,526,843,256.83
  5. Step 5: Solve for x
    x = 12,526,843,256.83/125,838.58
  6. Step 6: Final answer
    x = 99,546.92

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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.