Home / 87,438.60-120,557.70-64,745.64

Finding the Fourth Proportional to 87,438.60, 120,557.70 and 64,745.64

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Solution

The fourth proportional to 87,438.60, 120,557.70 and 64,745.64 is: 89,269.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,438.60 : 120,557.70 = 64,745.64 : x
  2. Step 2: Convert to fraction form
    87,438.60/120,557.70 = 64,745.64/x
  3. Step 3: Cross multiply
    87,438.60x = 120,557.70 × 64,745.64
  4. Step 4: Simplify right side
    87,438.60x = 7,805,585,443.43
  5. Step 5: Solve for x
    x = 7,805,585,443.43/87,438.60
  6. Step 6: Final answer
    x = 89,269.33

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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.