Home / 142,030.95-196,006.78-78,372.85

Finding the Fourth Proportional to 142,030.95, 196,006.78 and 78,372.85

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Solution

The fourth proportional to 142,030.95, 196,006.78 and 78,372.85 is: 108,156.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,030.95 : 196,006.78 = 78,372.85 : x
  2. Step 2: Convert to fraction form
    142,030.95/196,006.78 = 78,372.85/x
  3. Step 3: Cross multiply
    142,030.95x = 196,006.78 × 78,372.85
  4. Step 4: Simplify right side
    142,030.95x = 15,361,609,575.87
  5. Step 5: Solve for x
    x = 15,361,609,575.87/142,030.95
  6. Step 6: Final answer
    x = 108,156.78

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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.