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Finding the Fourth Proportional to 172,931.40, 259,348.50 and 84,187.80

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Solution

The fourth proportional to 172,931.40, 259,348.50 and 84,187.80 is: 126,258.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    172,931.40 : 259,348.50 = 84,187.80 : x
  2. Step 2: Convert to fraction form
    172,931.40/259,348.50 = 84,187.80/x
  3. Step 3: Cross multiply
    172,931.40x = 259,348.50 × 84,187.80
  4. Step 4: Simplify right side
    172,931.40x = 21,833,979,648.30
  5. Step 5: Solve for x
    x = 21,833,979,648.30/172,931.40
  6. Step 6: Final answer
    x = 126,258.04

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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.