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Finding the Fourth Proportional to 172,154, 258,240.72 and 61,346

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Solution

The fourth proportional to 172,154, 258,240.72 and 61,346 is: 92,022.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    172,154 : 258,240.72 = 61,346 : x
  2. Step 2: Convert to fraction form
    172,154/258,240.72 = 61,346/x
  3. Step 3: Cross multiply
    172,154x = 258,240.72 × 61,346
  4. Step 4: Simplify right side
    172,154x = 15,842,035,209.12
  5. Step 5: Solve for x
    x = 15,842,035,209.12/172,154
  6. Step 6: Final answer
    x = 92,022.46

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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.