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Finding the Fourth Proportional to 128,798.56, 177,652.20 and 124,463.44

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Solution

The fourth proportional to 128,798.56, 177,652.20 and 124,463.44 is: 171,672.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,798.56 : 177,652.20 = 124,463.44 : x
  2. Step 2: Convert to fraction form
    128,798.56/177,652.20 = 124,463.44/x
  3. Step 3: Cross multiply
    128,798.56x = 177,652.20 × 124,463.44
  4. Step 4: Simplify right side
    128,798.56x = 22,111,203,935.57
  5. Step 5: Solve for x
    x = 22,111,203,935.57/128,798.56
  6. Step 6: Final answer
    x = 171,672.76

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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.