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Finding the Fourth Proportional to 172,312.80, 258,363.36 and 67,009.08

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Solution

The fourth proportional to 172,312.80, 258,363.36 and 67,009.08 is: 100,472.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    172,312.80 : 258,363.36 = 67,009.08 : x
  2. Step 2: Convert to fraction form
    172,312.80/258,363.36 = 67,009.08/x
  3. Step 3: Cross multiply
    172,312.80x = 258,363.36 × 67,009.08
  4. Step 4: Simplify right side
    172,312.80x = 17,312,691,059.31
  5. Step 5: Solve for x
    x = 17,312,691,059.31/172,312.80
  6. Step 6: Final answer
    x = 100,472.46

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1.5x scale

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.