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Finding the Fourth Proportional to 72,551.72, 100,116.49 and 40,284.68

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Solution

The fourth proportional to 72,551.72, 100,116.49 and 40,284.68 is: 55,590.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,551.72 : 100,116.49 = 40,284.68 : x
  2. Step 2: Convert to fraction form
    72,551.72/100,116.49 = 40,284.68/x
  3. Step 3: Cross multiply
    72,551.72x = 100,116.49 × 40,284.68
  4. Step 4: Simplify right side
    72,551.72x = 4,033,160,762.37
  5. Step 5: Solve for x
    x = 4,033,160,762.37/72,551.72
  6. Step 6: Final answer
    x = 55,590.15

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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.