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Finding the Fourth Proportional to 64,713.28, 89,307.22 and 36,420.80

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Solution

The fourth proportional to 64,713.28, 89,307.22 and 36,420.80 is: 50,262.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    64,713.28 : 89,307.22 = 36,420.80 : x
  2. Step 2: Convert to fraction form
    64,713.28/89,307.22 = 36,420.80/x
  3. Step 3: Cross multiply
    64,713.28x = 89,307.22 × 36,420.80
  4. Step 4: Simplify right side
    64,713.28x = 3,252,640,398.18
  5. Step 5: Solve for x
    x = 3,252,640,398.18/64,713.28
  6. Step 6: Final answer
    x = 50,262.33

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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.