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Finding the Fourth Proportional to 172,421.70, 258,632.55 and 113,324.10

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Solution

The fourth proportional to 172,421.70, 258,632.55 and 113,324.10 is: 169,986.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    172,421.70 : 258,632.55 = 113,324.10 : x
  2. Step 2: Convert to fraction form
    172,421.70/258,632.55 = 113,324.10/x
  3. Step 3: Cross multiply
    172,421.70x = 258,632.55 × 113,324.10
  4. Step 4: Simplify right side
    172,421.70x = 29,309,300,959.46
  5. Step 5: Solve for x
    x = 29,309,300,959.46/172,421.70
  6. Step 6: Final answer
    x = 169,986.15

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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.