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Finding the Fourth Proportional to 74,643.48, 103,005.90 and 40,651.20

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Solution

The fourth proportional to 74,643.48, 103,005.90 and 40,651.20 is: 56,097.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,643.48 : 103,005.90 = 40,651.20 : x
  2. Step 2: Convert to fraction form
    74,643.48/103,005.90 = 40,651.20/x
  3. Step 3: Cross multiply
    74,643.48x = 103,005.90 × 40,651.20
  4. Step 4: Simplify right side
    74,643.48x = 4,187,313,442.08
  5. Step 5: Solve for x
    x = 4,187,313,442.08/74,643.48
  6. Step 6: Final answer
    x = 56,097.51

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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.