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Finding the Fourth Proportional to 125,908.44, 188,831.52 and 78,499.13

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Solution

The fourth proportional to 125,908.44, 188,831.52 and 78,499.13 is: 117,729.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    125,908.44 : 188,831.52 = 78,499.13 : x
  2. Step 2: Convert to fraction form
    125,908.44/188,831.52 = 78,499.13/x
  3. Step 3: Cross multiply
    125,908.44x = 188,831.52 × 78,499.13
  4. Step 4: Simplify right side
    125,908.44x = 14,823,110,126.10
  5. Step 5: Solve for x
    x = 14,823,110,126.10/125,908.44
  6. Step 6: Final answer
    x = 117,729.28

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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.