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Finding the Fourth Proportional to 64,189.72, 88,616.64 and 38,700.64

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Solution

The fourth proportional to 64,189.72, 88,616.64 and 38,700.64 is: 53,427.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    64,189.72 : 88,616.64 = 38,700.64 : x
  2. Step 2: Convert to fraction form
    64,189.72/88,616.64 = 38,700.64/x
  3. Step 3: Cross multiply
    64,189.72x = 88,616.64 × 38,700.64
  4. Step 4: Simplify right side
    64,189.72x = 3,429,520,682.65
  5. Step 5: Solve for x
    x = 3,429,520,682.65/64,189.72
  6. Step 6: Final answer
    x = 53,427.88

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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.