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Finding the Fourth Proportional to 74,900.79, 103,363.22 and 42,634.31

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Solution

The fourth proportional to 74,900.79, 103,363.22 and 42,634.31 is: 58,835.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,900.79 : 103,363.22 = 42,634.31 : x
  2. Step 2: Convert to fraction form
    74,900.79/103,363.22 = 42,634.31/x
  3. Step 3: Cross multiply
    74,900.79x = 103,363.22 × 42,634.31
  4. Step 4: Simplify right side
    74,900.79x = 4,406,819,153.85
  5. Step 5: Solve for x
    x = 4,406,819,153.85/74,900.79
  6. Step 6: Final answer
    x = 58,835.42

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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.