Home / 87,815.38-121,188.16-53,817.30

Finding the Fourth Proportional to 87,815.38, 121,188.16 and 53,817.30

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Solution

The fourth proportional to 87,815.38, 121,188.16 and 53,817.30 is: 74,269.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,815.38 : 121,188.16 = 53,817.30 : x
  2. Step 2: Convert to fraction form
    87,815.38/121,188.16 = 53,817.30/x
  3. Step 3: Cross multiply
    87,815.38x = 121,188.16 × 53,817.30
  4. Step 4: Simplify right side
    87,815.38x = 6,522,019,630.44
  5. Step 5: Solve for x
    x = 6,522,019,630.44/87,815.38
  6. Step 6: Final answer
    x = 74,269.67

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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.