Home / 119,799.18-165,376-77,378.40

Finding the Fourth Proportional to 119,799.18, 165,376 and 77,378.40

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Solution

The fourth proportional to 119,799.18, 165,376 and 77,378.40 is: 106,816.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    119,799.18 : 165,376 = 77,378.40 : x
  2. Step 2: Convert to fraction form
    119,799.18/165,376 = 77,378.40/x
  3. Step 3: Cross multiply
    119,799.18x = 165,376 × 77,378.40
  4. Step 4: Simplify right side
    119,799.18x = 12,796,530,278.40
  5. Step 5: Solve for x
    x = 12,796,530,278.40/119,799.18
  6. Step 6: Final answer
    x = 106,816.51

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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.