Home / 142,180.11-196,206.98-78,516.63

Finding the Fourth Proportional to 142,180.11, 196,206.98 and 78,516.63

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Solution

The fourth proportional to 142,180.11, 196,206.98 and 78,516.63 is: 108,352.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,180.11 : 196,206.98 = 78,516.63 : x
  2. Step 2: Convert to fraction form
    142,180.11/196,206.98 = 78,516.63/x
  3. Step 3: Cross multiply
    142,180.11x = 196,206.98 × 78,516.63
  4. Step 4: Simplify right side
    142,180.11x = 15,405,510,459.49
  5. Step 5: Solve for x
    x = 15,405,510,459.49/142,180.11
  6. Step 6: Final answer
    x = 108,352.08

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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.