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Finding the Fourth Proportional to 139,419.65, 192,398.75 and 75,757.45

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Solution

The fourth proportional to 139,419.65, 192,398.75 and 75,757.45 is: 104,545.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,419.65 : 192,398.75 = 75,757.45 : x
  2. Step 2: Convert to fraction form
    139,419.65/192,398.75 = 75,757.45/x
  3. Step 3: Cross multiply
    139,419.65x = 192,398.75 × 75,757.45
  4. Step 4: Simplify right side
    139,419.65x = 14,575,638,107.49
  5. Step 5: Solve for x
    x = 14,575,638,107.49/139,419.65
  6. Step 6: Final answer
    x = 104,545.08

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1.5x scale

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.