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Finding the Fourth Proportional to 64,380, 88,824.84 and 40,530.48

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Solution

The fourth proportional to 64,380, 88,824.84 and 40,530.48 is: 55,919.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    64,380 : 88,824.84 = 40,530.48 : x
  2. Step 2: Convert to fraction form
    64,380/88,824.84 = 40,530.48/x
  3. Step 3: Cross multiply
    64,380x = 88,824.84 × 40,530.48
  4. Step 4: Simplify right side
    64,380x = 3,600,113,401.12
  5. Step 5: Solve for x
    x = 3,600,113,401.12/64,380
  6. Step 6: Final answer
    x = 55,919.75

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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.