Home / 135,445.13-186,913.80-78,084.17

Finding the Fourth Proportional to 135,445.13, 186,913.80 and 78,084.17

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Solution

The fourth proportional to 135,445.13, 186,913.80 and 78,084.17 is: 107,755.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    135,445.13 : 186,913.80 = 78,084.17 : x
  2. Step 2: Convert to fraction form
    135,445.13/186,913.80 = 78,084.17/x
  3. Step 3: Cross multiply
    135,445.13x = 186,913.80 × 78,084.17
  4. Step 4: Simplify right side
    135,445.13x = 14,595,009,694.65
  5. Step 5: Solve for x
    x = 14,595,009,694.65/135,445.13
  6. Step 6: Final answer
    x = 107,755.89

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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.