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Finding the Fourth Proportional to 138,569.86, 191,226.56 and 74,907.67

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Solution

The fourth proportional to 138,569.86, 191,226.56 and 74,907.67 is: 103,372.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,569.86 : 191,226.56 = 74,907.67 : x
  2. Step 2: Convert to fraction form
    138,569.86/191,226.56 = 74,907.67/x
  3. Step 3: Cross multiply
    138,569.86x = 191,226.56 × 74,907.67
  4. Step 4: Simplify right side
    138,569.86x = 14,324,336,051.72
  5. Step 5: Solve for x
    x = 14,324,336,051.72/138,569.86
  6. Step 6: Final answer
    x = 103,372.67

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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.