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Finding the Fourth Proportional to 172,271.79, 258,484.56 and 87,987.57

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Solution

The fourth proportional to 172,271.79, 258,484.56 and 87,987.57 is: 132,020.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    172,271.79 : 258,484.56 = 87,987.57 : x
  2. Step 2: Convert to fraction form
    172,271.79/258,484.56 = 87,987.57/x
  3. Step 3: Cross multiply
    172,271.79x = 258,484.56 × 87,987.57
  4. Step 4: Simplify right side
    172,271.79x = 22,743,428,316.92
  5. Step 5: Solve for x
    x = 22,743,428,316.92/172,271.79
  6. Step 6: Final answer
    x = 132,020.62

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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.