Home / 85,280.31-127,920.76-26,115.72

Finding the Fourth Proportional to 85,280.31, 127,920.76 and 26,115.72

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Solution

The fourth proportional to 85,280.31, 127,920.76 and 26,115.72 is: 39,173.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,280.31 : 127,920.76 = 26,115.72 : x
  2. Step 2: Convert to fraction form
    85,280.31/127,920.76 = 26,115.72/x
  3. Step 3: Cross multiply
    85,280.31x = 127,920.76 × 26,115.72
  4. Step 4: Simplify right side
    85,280.31x = 3,340,742,750.35
  5. Step 5: Solve for x
    x = 3,340,742,750.35/85,280.31
  6. Step 6: Final answer
    x = 39,173.67

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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.