Home / 87,765.35-121,115.81-47,479.01

Finding the Fourth Proportional to 87,765.35, 121,115.81 and 47,479.01

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Solution

The fourth proportional to 87,765.35, 121,115.81 and 47,479.01 is: 65,520.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,765.35 : 121,115.81 = 47,479.01 : x
  2. Step 2: Convert to fraction form
    87,765.35/121,115.81 = 47,479.01/x
  3. Step 3: Cross multiply
    87,765.35x = 121,115.81 × 47,479.01
  4. Step 4: Simplify right side
    87,765.35x = 5,750,459,175.64
  5. Step 5: Solve for x
    x = 5,750,459,175.64/87,765.35
  6. Step 6: Final answer
    x = 65,520.84

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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.