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Finding the Fourth Proportional to 172,125.76, 258,188.64 and 61,240

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Solution

The fourth proportional to 172,125.76, 258,188.64 and 61,240 is: 91,860

Step by Step Solution

  1. Step 1: Write the proportion equation
    172,125.76 : 258,188.64 = 61,240 : x
  2. Step 2: Convert to fraction form
    172,125.76/258,188.64 = 61,240/x
  3. Step 3: Cross multiply
    172,125.76x = 258,188.64 × 61,240
  4. Step 4: Simplify right side
    172,125.76x = 15,811,472,313.60
  5. Step 5: Solve for x
    x = 15,811,472,313.60/172,125.76
  6. Step 6: Final answer
    x = 91,860

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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.