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Finding the Fourth Proportional to 172,225.80, 258,233.04 and 66,921.84

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Solution

The fourth proportional to 172,225.80, 258,233.04 and 66,921.84 is: 100,341.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    172,225.80 : 258,233.04 = 66,921.84 : x
  2. Step 2: Convert to fraction form
    172,225.80/258,233.04 = 66,921.84/x
  3. Step 3: Cross multiply
    172,225.80x = 258,233.04 × 66,921.84
  4. Step 4: Simplify right side
    172,225.80x = 17,281,430,185.59
  5. Step 5: Solve for x
    x = 17,281,430,185.59/172,225.80
  6. Step 6: Final answer
    x = 100,341.70

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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.