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Finding the Fourth Proportional to 172,987.60, 259,675.80 and 133,718.80

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Solution

The fourth proportional to 172,987.60, 259,675.80 and 133,718.80 is: 200,728.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    172,987.60 : 259,675.80 = 133,718.80 : x
  2. Step 2: Convert to fraction form
    172,987.60/259,675.80 = 133,718.80/x
  3. Step 3: Cross multiply
    172,987.60x = 259,675.80 × 133,718.80
  4. Step 4: Simplify right side
    172,987.60x = 34,723,536,365.04
  5. Step 5: Solve for x
    x = 34,723,536,365.04/172,987.60
  6. Step 6: Final answer
    x = 200,728.47

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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.