Home / 142,101.36-196,101.50-78,439.19

Finding the Fourth Proportional to 142,101.36, 196,101.50 and 78,439.19

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Solution

The fourth proportional to 142,101.36, 196,101.50 and 78,439.19 is: 108,246.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,101.36 : 196,101.50 = 78,439.19 : x
  2. Step 2: Convert to fraction form
    142,101.36/196,101.50 = 78,439.19/x
  3. Step 3: Cross multiply
    142,101.36x = 196,101.50 × 78,439.19
  4. Step 4: Simplify right side
    142,101.36x = 15,382,041,445.08
  5. Step 5: Solve for x
    x = 15,382,041,445.08/142,101.36
  6. Step 6: Final answer
    x = 108,246.97

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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.