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Finding the Fourth Proportional to 129,555.75, 178,831.68 and 75,858.03

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Solution

The fourth proportional to 129,555.75, 178,831.68 and 75,858.03 is: 104,710.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,555.75 : 178,831.68 = 75,858.03 : x
  2. Step 2: Convert to fraction form
    129,555.75/178,831.68 = 75,858.03/x
  3. Step 3: Cross multiply
    129,555.75x = 178,831.68 × 75,858.03
  4. Step 4: Simplify right side
    129,555.75x = 13,565,818,946.39
  5. Step 5: Solve for x
    x = 13,565,818,946.39/129,555.75
  6. Step 6: Final answer
    x = 104,710.28

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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.