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Finding the Fourth Proportional to 230,644, 318,288.72 and 124,660

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Solution

The fourth proportional to 230,644, 318,288.72 and 124,660 is: 172,030.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    230,644 : 318,288.72 = 124,660 : x
  2. Step 2: Convert to fraction form
    230,644/318,288.72 = 124,660/x
  3. Step 3: Cross multiply
    230,644x = 318,288.72 × 124,660
  4. Step 4: Simplify right side
    230,644x = 39,677,871,835.20
  5. Step 5: Solve for x
    x = 39,677,871,835.20/230,644
  6. Step 6: Final answer
    x = 172,030.80

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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.