Home / 91,778.20-137,667.30-56,786.20

Finding the Fourth Proportional to 91,778.20, 137,667.30 and 56,786.20

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Solution

The fourth proportional to 91,778.20, 137,667.30 and 56,786.20 is: 85,179.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,778.20 : 137,667.30 = 56,786.20 : x
  2. Step 2: Convert to fraction form
    91,778.20/137,667.30 = 56,786.20/x
  3. Step 3: Cross multiply
    91,778.20x = 137,667.30 × 56,786.20
  4. Step 4: Simplify right side
    91,778.20x = 7,817,602,831.26
  5. Step 5: Solve for x
    x = 7,817,602,831.26/91,778.20
  6. Step 6: Final answer
    x = 85,179.30

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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.