Home / 142,127.19-196,135.16-78,464.57

Finding the Fourth Proportional to 142,127.19, 196,135.16 and 78,464.57

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Solution

The fourth proportional to 142,127.19, 196,135.16 and 78,464.57 is: 108,280.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,127.19 : 196,135.16 = 78,464.57 : x
  2. Step 2: Convert to fraction form
    142,127.19/196,135.16 = 78,464.57/x
  3. Step 3: Cross multiply
    142,127.19x = 196,135.16 × 78,464.57
  4. Step 4: Simplify right side
    142,127.19x = 15,389,659,618.28
  5. Step 5: Solve for x
    x = 15,389,659,618.28/142,127.19
  6. Step 6: Final answer
    x = 108,280.90

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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.