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Finding the Fourth Proportional to 127,341.57, 175,683.69 and 78,921.39

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Solution

The fourth proportional to 127,341.57, 175,683.69 and 78,921.39 is: 108,881.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    127,341.57 : 175,683.69 = 78,921.39 : x
  2. Step 2: Convert to fraction form
    127,341.57/175,683.69 = 78,921.39/x
  3. Step 3: Cross multiply
    127,341.57x = 175,683.69 × 78,921.39
  4. Step 4: Simplify right side
    127,341.57x = 13,865,201,015.13
  5. Step 5: Solve for x
    x = 13,865,201,015.13/127,341.57
  6. Step 6: Final answer
    x = 108,881.97

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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.