Home / 87,765.03-121,115.25-47,478.67

Finding the Fourth Proportional to 87,765.03, 121,115.25 and 47,478.67

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Solution

The fourth proportional to 87,765.03, 121,115.25 and 47,478.67 is: 65,520.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,765.03 : 121,115.25 = 47,478.67 : x
  2. Step 2: Convert to fraction form
    87,765.03/121,115.25 = 47,478.67/x
  3. Step 3: Cross multiply
    87,765.03x = 121,115.25 × 47,478.67
  4. Step 4: Simplify right side
    87,765.03x = 5,750,390,683.93
  5. Step 5: Solve for x
    x = 5,750,390,683.93/87,765.03
  6. Step 6: Final answer
    x = 65,520.30

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.