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Finding the Fourth Proportional to 64,648.70, 89,227.49 and 40,460.91

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Solution

The fourth proportional to 64,648.70, 89,227.49 and 40,460.91 is: 55,843.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    64,648.70 : 89,227.49 = 40,460.91 : x
  2. Step 2: Convert to fraction form
    64,648.70/89,227.49 = 40,460.91/x
  3. Step 3: Cross multiply
    64,648.70x = 89,227.49 × 40,460.91
  4. Step 4: Simplify right side
    64,648.70x = 3,610,225,766.64
  5. Step 5: Solve for x
    x = 3,610,225,766.64/64,648.70
  6. Step 6: Final answer
    x = 55,843.75

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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.