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Finding the Fourth Proportional to 114,258.96, 157,680 and 66,520.80

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Solution

The fourth proportional to 114,258.96, 157,680 and 66,520.80 is: 91,800.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    114,258.96 : 157,680 = 66,520.80 : x
  2. Step 2: Convert to fraction form
    114,258.96/157,680 = 66,520.80/x
  3. Step 3: Cross multiply
    114,258.96x = 157,680 × 66,520.80
  4. Step 4: Simplify right side
    114,258.96x = 10,488,999,744
  5. Step 5: Solve for x
    x = 10,488,999,744/114,258.96
  6. Step 6: Final answer
    x = 91,800.24

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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.