Home / 129,811.78-179,140.20-70,195.78

Finding the Fourth Proportional to 129,811.78, 179,140.20 and 70,195.78

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Solution

The fourth proportional to 129,811.78, 179,140.20 and 70,195.78 is: 96,870.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,811.78 : 179,140.20 = 70,195.78 : x
  2. Step 2: Convert to fraction form
    129,811.78/179,140.20 = 70,195.78/x
  3. Step 3: Cross multiply
    129,811.78x = 179,140.20 × 70,195.78
  4. Step 4: Simplify right side
    129,811.78x = 12,574,886,068.36
  5. Step 5: Solve for x
    x = 12,574,886,068.36/129,811.78
  6. Step 6: Final answer
    x = 96,870.15

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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.