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Finding the Fourth Proportional to 64,387.02, 88,821 and 38,879.28

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Solution

The fourth proportional to 64,387.02, 88,821 and 38,879.28 is: 53,633.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    64,387.02 : 88,821 = 38,879.28 : x
  2. Step 2: Convert to fraction form
    64,387.02/88,821 = 38,879.28/x
  3. Step 3: Cross multiply
    64,387.02x = 88,821 × 38,879.28
  4. Step 4: Simplify right side
    64,387.02x = 3,453,296,528.88
  5. Step 5: Solve for x
    x = 3,453,296,528.88/64,387.02
  6. Step 6: Final answer
    x = 53,633.43

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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.