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Finding the Fourth Proportional to 172,143.10, 237,490.95 and 126,928.09

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Solution

The fourth proportional to 172,143.10, 237,490.95 and 126,928.09 is: 175,111.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    172,143.10 : 237,490.95 = 126,928.09 : x
  2. Step 2: Convert to fraction form
    172,143.10/237,490.95 = 126,928.09/x
  3. Step 3: Cross multiply
    172,143.10x = 237,490.95 × 126,928.09
  4. Step 4: Simplify right side
    172,143.10x = 30,144,272,675.79
  5. Step 5: Solve for x
    x = 30,144,272,675.79/172,143.10
  6. Step 6: Final answer
    x = 175,111.71

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.