Home / 142,152.50-196,170.39-78,490.28

Finding the Fourth Proportional to 142,152.50, 196,170.39 and 78,490.28

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Solution

The fourth proportional to 142,152.50, 196,170.39 and 78,490.28 is: 108,316.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,152.50 : 196,170.39 = 78,490.28 : x
  2. Step 2: Convert to fraction form
    142,152.50/196,170.39 = 78,490.28/x
  3. Step 3: Cross multiply
    142,152.50x = 196,170.39 × 78,490.28
  4. Step 4: Simplify right side
    142,152.50x = 15,397,469,329.24
  5. Step 5: Solve for x
    x = 15,397,469,329.24/142,152.50
  6. Step 6: Final answer
    x = 108,316.55

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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.