Home / 127,557.80-191,336.70-80,863.40

Finding the Fourth Proportional to 127,557.80, 191,336.70 and 80,863.40

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Solution

The fourth proportional to 127,557.80, 191,336.70 and 80,863.40 is: 121,295.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    127,557.80 : 191,336.70 = 80,863.40 : x
  2. Step 2: Convert to fraction form
    127,557.80/191,336.70 = 80,863.40/x
  3. Step 3: Cross multiply
    127,557.80x = 191,336.70 × 80,863.40
  4. Step 4: Simplify right side
    127,557.80x = 15,472,136,106.78
  5. Step 5: Solve for x
    x = 15,472,136,106.78/127,557.80
  6. Step 6: Final answer
    x = 121,295.10

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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.