Home / 129,621.80-194,432.70-70,639.40

Finding the Fourth Proportional to 129,621.80, 194,432.70 and 70,639.40

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Solution

The fourth proportional to 129,621.80, 194,432.70 and 70,639.40 is: 105,959.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,621.80 : 194,432.70 = 70,639.40 : x
  2. Step 2: Convert to fraction form
    129,621.80/194,432.70 = 70,639.40/x
  3. Step 3: Cross multiply
    129,621.80x = 194,432.70 × 70,639.40
  4. Step 4: Simplify right side
    129,621.80x = 13,734,609,268.38
  5. Step 5: Solve for x
    x = 13,734,609,268.38/129,621.80
  6. Step 6: Final answer
    x = 105,959.10

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.