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Finding the Fourth Proportional to 172,558.13, 238,127.96 and 99,970.92

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Solution

The fourth proportional to 172,558.13, 238,127.96 and 99,970.92 is: 137,958.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    172,558.13 : 238,127.96 = 99,970.92 : x
  2. Step 2: Convert to fraction form
    172,558.13/238,127.96 = 99,970.92/x
  3. Step 3: Cross multiply
    172,558.13x = 238,127.96 × 99,970.92
  4. Step 4: Simplify right side
    172,558.13x = 23,805,871,488.85
  5. Step 5: Solve for x
    x = 23,805,871,488.85/172,558.13
  6. Step 6: Final answer
    x = 137,958.57

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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.