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Finding the Fourth Proportional to 125,875.87, 173,688.38 and 72,151

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Solution

The fourth proportional to 125,875.87, 173,688.38 and 72,151 is: 99,556.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    125,875.87 : 173,688.38 = 72,151 : x
  2. Step 2: Convert to fraction form
    125,875.87/173,688.38 = 72,151/x
  3. Step 3: Cross multiply
    125,875.87x = 173,688.38 × 72,151
  4. Step 4: Simplify right side
    125,875.87x = 12,531,789,944.63
  5. Step 5: Solve for x
    x = 12,531,789,944.63/125,875.87
  6. Step 6: Final answer
    x = 99,556.73

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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.