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Finding the Fourth Proportional to 172,559.13, 238,129.34 and 99,971.92

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Solution

The fourth proportional to 172,559.13, 238,129.34 and 99,971.92 is: 137,959.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    172,559.13 : 238,129.34 = 99,971.92 : x
  2. Step 2: Convert to fraction form
    172,559.13/238,129.34 = 99,971.92/x
  3. Step 3: Cross multiply
    172,559.13x = 238,129.34 × 99,971.92
  4. Step 4: Simplify right side
    172,559.13x = 23,806,247,328.13
  5. Step 5: Solve for x
    x = 23,806,247,328.13/172,559.13
  6. Step 6: Final answer
    x = 137,959.94

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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.