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Finding the Fourth Proportional to 74,981.01, 103,473.99 and 40,989.90

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Solution

The fourth proportional to 74,981.01, 103,473.99 and 40,989.90 is: 56,566.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,981.01 : 103,473.99 = 40,989.90 : x
  2. Step 2: Convert to fraction form
    74,981.01/103,473.99 = 40,989.90/x
  3. Step 3: Cross multiply
    74,981.01x = 103,473.99 × 40,989.90
  4. Step 4: Simplify right side
    74,981.01x = 4,241,388,502.70
  5. Step 5: Solve for x
    x = 4,241,388,502.70/74,981.01
  6. Step 6: Final answer
    x = 56,566.17

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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.