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Finding the Fourth Proportional to 64,743.12, 89,343.36 and 36,443.40

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Solution

The fourth proportional to 64,743.12, 89,343.36 and 36,443.40 is: 50,290.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    64,743.12 : 89,343.36 = 36,443.40 : x
  2. Step 2: Convert to fraction form
    64,743.12/89,343.36 = 36,443.40/x
  3. Step 3: Cross multiply
    64,743.12x = 89,343.36 × 36,443.40
  4. Step 4: Simplify right side
    64,743.12x = 3,255,975,805.82
  5. Step 5: Solve for x
    x = 3,255,975,805.82/64,743.12
  6. Step 6: Final answer
    x = 50,290.68

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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.