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Finding the Fourth Proportional to 64,138.66, 88,542.90 and 40,278.49

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Solution

The fourth proportional to 64,138.66, 88,542.90 and 40,278.49 is: 55,604.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    64,138.66 : 88,542.90 = 40,278.49 : x
  2. Step 2: Convert to fraction form
    64,138.66/88,542.90 = 40,278.49/x
  3. Step 3: Cross multiply
    64,138.66x = 88,542.90 × 40,278.49
  4. Step 4: Simplify right side
    64,138.66x = 3,566,374,090.86
  5. Step 5: Solve for x
    x = 3,566,374,090.86/64,138.66
  6. Step 6: Final answer
    x = 55,604.13

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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.