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Finding the Fourth Proportional to 64,988.64, 89,691.84 and 39,496.32

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Solution

The fourth proportional to 64,988.64, 89,691.84 and 39,496.32 is: 54,509.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    64,988.64 : 89,691.84 = 39,496.32 : x
  2. Step 2: Convert to fraction form
    64,988.64/89,691.84 = 39,496.32/x
  3. Step 3: Cross multiply
    64,988.64x = 89,691.84 × 39,496.32
  4. Step 4: Simplify right side
    64,988.64x = 3,542,497,614.03
  5. Step 5: Solve for x
    x = 3,542,497,614.03/64,988.64
  6. Step 6: Final answer
    x = 54,509.49

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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.