Home / 142,219.45-196,263.50-77,689.57

Finding the Fourth Proportional to 142,219.45, 196,263.50 and 77,689.57

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Solution

The fourth proportional to 142,219.45, 196,263.50 and 77,689.57 is: 107,211.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,219.45 : 196,263.50 = 77,689.57 : x
  2. Step 2: Convert to fraction form
    142,219.45/196,263.50 = 77,689.57/x
  3. Step 3: Cross multiply
    142,219.45x = 196,263.50 × 77,689.57
  4. Step 4: Simplify right side
    142,219.45x = 15,247,626,921.70
  5. Step 5: Solve for x
    x = 15,247,626,921.70/142,219.45
  6. Step 6: Final answer
    x = 107,211.97

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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.