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Finding the Fourth Proportional to 74,354.32, 111,531.54 and 61,178.99

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Solution

The fourth proportional to 74,354.32, 111,531.54 and 61,178.99 is: 91,768.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,354.32 : 111,531.54 = 61,178.99 : x
  2. Step 2: Convert to fraction form
    74,354.32/111,531.54 = 61,178.99/x
  3. Step 3: Cross multiply
    74,354.32x = 111,531.54 × 61,178.99
  4. Step 4: Simplify right side
    74,354.32x = 6,823,387,199.77
  5. Step 5: Solve for x
    x = 6,823,387,199.77/74,354.32
  6. Step 6: Final answer
    x = 91,768.54

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.