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Finding the Fourth Proportional to 63,064.70, 86,980.05 and 40,405.80

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Solution

The fourth proportional to 63,064.70, 86,980.05 and 40,405.80 is: 55,728.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    63,064.70 : 86,980.05 = 40,405.80 : x
  2. Step 2: Convert to fraction form
    63,064.70/86,980.05 = 40,405.80/x
  3. Step 3: Cross multiply
    63,064.70x = 86,980.05 × 40,405.80
  4. Step 4: Simplify right side
    63,064.70x = 3,514,498,944.11
  5. Step 5: Solve for x
    x = 3,514,498,944.11/63,064.70
  6. Step 6: Final answer
    x = 55,728.46

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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.