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Finding the Fourth Proportional to 230,606.61, 318,237.61 and 128,629.45

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Solution

The fourth proportional to 230,606.61, 318,237.61 and 128,629.45 is: 177,508.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    230,606.61 : 318,237.61 = 128,629.45 : x
  2. Step 2: Convert to fraction form
    230,606.61/318,237.61 = 128,629.45/x
  3. Step 3: Cross multiply
    230,606.61x = 318,237.61 × 128,629.45
  4. Step 4: Simplify right side
    230,606.61x = 40,934,729,061.02
  5. Step 5: Solve for x
    x = 40,934,729,061.02/230,606.61
  6. Step 6: Final answer
    x = 177,508.91

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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.