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Finding the Fourth Proportional to 138,751.48, 191,477.32 and 75,089.73

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Solution

The fourth proportional to 138,751.48, 191,477.32 and 75,089.73 is: 103,623.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,751.48 : 191,477.32 = 75,089.73 : x
  2. Step 2: Convert to fraction form
    138,751.48/191,477.32 = 75,089.73/x
  3. Step 3: Cross multiply
    138,751.48x = 191,477.32 × 75,089.73
  4. Step 4: Simplify right side
    138,751.48x = 14,377,980,790.24
  5. Step 5: Solve for x
    x = 14,377,980,790.24/138,751.48
  6. Step 6: Final answer
    x = 103,623.98

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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.