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Finding the Fourth Proportional to 104,719.36, 157,019.54 and 71,479.66

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Solution

The fourth proportional to 104,719.36, 157,019.54 and 71,479.66 is: 107,178.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    104,719.36 : 157,019.54 = 71,479.66 : x
  2. Step 2: Convert to fraction form
    104,719.36/157,019.54 = 71,479.66/x
  3. Step 3: Cross multiply
    104,719.36x = 157,019.54 × 71,479.66
  4. Step 4: Simplify right side
    104,719.36x = 11,223,703,332.56
  5. Step 5: Solve for x
    x = 11,223,703,332.56/104,719.36
  6. Step 6: Final answer
    x = 107,178.88

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.