Home / 78,258.03-117,385.89-54,220.15

Finding the Fourth Proportional to 78,258.03, 117,385.89 and 54,220.15

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Solution

The fourth proportional to 78,258.03, 117,385.89 and 54,220.15 is: 81,329.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,258.03 : 117,385.89 = 54,220.15 : x
  2. Step 2: Convert to fraction form
    78,258.03/117,385.89 = 54,220.15/x
  3. Step 3: Cross multiply
    78,258.03x = 117,385.89 × 54,220.15
  4. Step 4: Simplify right side
    78,258.03x = 6,364,680,563.68
  5. Step 5: Solve for x
    x = 6,364,680,563.68/78,258.03
  6. Step 6: Final answer
    x = 81,329.42

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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.