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Finding the Fourth Proportional to 128,119.43, 176,791.37 and 74,393.93

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Solution

The fourth proportional to 128,119.43, 176,791.37 and 74,393.93 is: 102,655.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,119.43 : 176,791.37 = 74,393.93 : x
  2. Step 2: Convert to fraction form
    128,119.43/176,791.37 = 74,393.93/x
  3. Step 3: Cross multiply
    128,119.43x = 176,791.37 × 74,393.93
  4. Step 4: Simplify right side
    128,119.43x = 13,152,203,548.46
  5. Step 5: Solve for x
    x = 13,152,203,548.46/128,119.43
  6. Step 6: Final answer
    x = 102,655.81

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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.