Home / 142,030.87-196,006.68-78,372.77

Finding the Fourth Proportional to 142,030.87, 196,006.68 and 78,372.77

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Solution

The fourth proportional to 142,030.87, 196,006.68 and 78,372.77 is: 108,156.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,030.87 : 196,006.68 = 78,372.77 : x
  2. Step 2: Convert to fraction form
    142,030.87/196,006.68 = 78,372.77/x
  3. Step 3: Cross multiply
    142,030.87x = 196,006.68 × 78,372.77
  4. Step 4: Simplify right side
    142,030.87x = 15,361,585,078.21
  5. Step 5: Solve for x
    x = 15,361,585,078.21/142,030.87
  6. Step 6: Final answer
    x = 108,156.66

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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.