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Finding the Fourth Proportional to 138,888.63, 191,666.31 and 75,226.89

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Solution

The fourth proportional to 138,888.63, 191,666.31 and 75,226.89 is: 103,813.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,888.63 : 191,666.31 = 75,226.89 : x
  2. Step 2: Convert to fraction form
    138,888.63/191,666.31 = 75,226.89/x
  3. Step 3: Cross multiply
    138,888.63x = 191,666.31 × 75,226.89
  4. Step 4: Simplify right side
    138,888.63x = 14,418,460,419.08
  5. Step 5: Solve for x
    x = 14,418,460,419.08/138,888.63
  6. Step 6: Final answer
    x = 103,813.11

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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.