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Finding the Fourth Proportional to 78,352.39, 117,503.65 and 25,749.73

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Solution

The fourth proportional to 78,352.39, 117,503.65 and 25,749.73 is: 38,616.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,352.39 : 117,503.65 = 25,749.73 : x
  2. Step 2: Convert to fraction form
    78,352.39/117,503.65 = 25,749.73/x
  3. Step 3: Cross multiply
    78,352.39x = 117,503.65 × 25,749.73
  4. Step 4: Simplify right side
    78,352.39x = 3,025,687,261.51
  5. Step 5: Solve for x
    x = 3,025,687,261.51/78,352.39
  6. Step 6: Final answer
    x = 38,616.40

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1.5x scale

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.