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Finding the Fourth Proportional to 64,748.28, 89,365.92 and 40,858.92

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Solution

The fourth proportional to 64,748.28, 89,365.92 and 40,858.92 is: 56,393.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    64,748.28 : 89,365.92 = 40,858.92 : x
  2. Step 2: Convert to fraction form
    64,748.28/89,365.92 = 40,858.92/x
  3. Step 3: Cross multiply
    64,748.28x = 89,365.92 × 40,858.92
  4. Step 4: Simplify right side
    64,748.28x = 3,651,394,976.01
  5. Step 5: Solve for x
    x = 3,651,394,976.01/64,748.28
  6. Step 6: Final answer
    x = 56,393.70

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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.