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Finding the Fourth Proportional to 60,725, 91,087.50 and 19,172

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Solution

The fourth proportional to 60,725, 91,087.50 and 19,172 is: 28,758

Step by Step Solution

  1. Step 1: Write the proportion equation
    60,725 : 91,087.50 = 19,172 : x
  2. Step 2: Convert to fraction form
    60,725/91,087.50 = 19,172/x
  3. Step 3: Cross multiply
    60,725x = 91,087.50 × 19,172
  4. Step 4: Simplify right side
    60,725x = 1,746,329,550
  5. Step 5: Solve for x
    x = 1,746,329,550/60,725
  6. Step 6: Final answer
    x = 28,758

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.