Home / 128,853.40-193,280.10-76,235.80

Finding the Fourth Proportional to 128,853.40, 193,280.10 and 76,235.80

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Solution

The fourth proportional to 128,853.40, 193,280.10 and 76,235.80 is: 114,353.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,853.40 : 193,280.10 = 76,235.80 : x
  2. Step 2: Convert to fraction form
    128,853.40/193,280.10 = 76,235.80/x
  3. Step 3: Cross multiply
    128,853.40x = 193,280.10 × 76,235.80
  4. Step 4: Simplify right side
    128,853.40x = 14,734,863,047.58
  5. Step 5: Solve for x
    x = 14,734,863,047.58/128,853.40
  6. Step 6: Final answer
    x = 114,353.70

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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.