Home / 125,421.12-188,164.49-72,780.03

Finding the Fourth Proportional to 125,421.12, 188,164.49 and 72,780.03

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Solution

The fourth proportional to 125,421.12, 188,164.49 and 72,780.03 is: 109,189.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    125,421.12 : 188,164.49 = 72,780.03 : x
  2. Step 2: Convert to fraction form
    125,421.12/188,164.49 = 72,780.03/x
  3. Step 3: Cross multiply
    125,421.12x = 188,164.49 × 72,780.03
  4. Step 4: Simplify right side
    125,421.12x = 13,694,616,863.23
  5. Step 5: Solve for x
    x = 13,694,616,863.23/125,421.12
  6. Step 6: Final answer
    x = 109,189.08

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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.