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Finding the Fourth Proportional to 138,787.52, 191,526.80 and 75,125.84

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Solution

The fourth proportional to 138,787.52, 191,526.80 and 75,125.84 is: 103,673.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,787.52 : 191,526.80 = 75,125.84 : x
  2. Step 2: Convert to fraction form
    138,787.52/191,526.80 = 75,125.84/x
  3. Step 3: Cross multiply
    138,787.52x = 191,526.80 × 75,125.84
  4. Step 4: Simplify right side
    138,787.52x = 14,388,611,732.51
  5. Step 5: Solve for x
    x = 14,388,611,732.51/138,787.52
  6. Step 6: Final answer
    x = 103,673.67

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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.