Home / 86,856.20-130,503-55,280.78

Finding the Fourth Proportional to 86,856.20, 130,503 and 55,280.78

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Solution

The fourth proportional to 86,856.20, 130,503 and 55,280.78 is: 83,060.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,856.20 : 130,503 = 55,280.78 : x
  2. Step 2: Convert to fraction form
    86,856.20/130,503 = 55,280.78/x
  3. Step 3: Cross multiply
    86,856.20x = 130,503 × 55,280.78
  4. Step 4: Simplify right side
    86,856.20x = 7,214,307,632.34
  5. Step 5: Solve for x
    x = 7,214,307,632.34/86,856.20
  6. Step 6: Final answer
    x = 83,060.36

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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.