Home / 142,169.10-196,192.11-78,507.42

Finding the Fourth Proportional to 142,169.10, 196,192.11 and 78,507.42

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Solution

The fourth proportional to 142,169.10, 196,192.11 and 78,507.42 is: 108,339.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,169.10 : 196,192.11 = 78,507.42 : x
  2. Step 2: Convert to fraction form
    142,169.10/196,192.11 = 78,507.42/x
  3. Step 3: Cross multiply
    142,169.10x = 196,192.11 × 78,507.42
  4. Step 4: Simplify right side
    142,169.10x = 15,402,536,380.46
  5. Step 5: Solve for x
    x = 15,402,536,380.46/142,169.10
  6. Step 6: Final answer
    x = 108,339.55

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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.