Home / 113,828.80-170,743.20-78,399.40

Finding the Fourth Proportional to 113,828.80, 170,743.20 and 78,399.40

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Solution

The fourth proportional to 113,828.80, 170,743.20 and 78,399.40 is: 117,599.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    113,828.80 : 170,743.20 = 78,399.40 : x
  2. Step 2: Convert to fraction form
    113,828.80/170,743.20 = 78,399.40/x
  3. Step 3: Cross multiply
    113,828.80x = 170,743.20 × 78,399.40
  4. Step 4: Simplify right side
    113,828.80x = 13,386,164,434.08
  5. Step 5: Solve for x
    x = 13,386,164,434.08/113,828.80
  6. Step 6: Final answer
    x = 117,599.10

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.