Home / 118,546.72-163,331.92-78,189.28

Finding the Fourth Proportional to 118,546.72, 163,331.92 and 78,189.28

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Solution

The fourth proportional to 118,546.72, 163,331.92 and 78,189.28 is: 107,728.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    118,546.72 : 163,331.92 = 78,189.28 : x
  2. Step 2: Convert to fraction form
    118,546.72/163,331.92 = 78,189.28/x
  3. Step 3: Cross multiply
    118,546.72x = 163,331.92 × 78,189.28
  4. Step 4: Simplify right side
    118,546.72x = 12,770,805,225.82
  5. Step 5: Solve for x
    x = 12,770,805,225.82/118,546.72
  6. Step 6: Final answer
    x = 107,728.04

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1.5x scale

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.