Home / 289,909.03-434,904.56-90,249.57

Finding the Fourth Proportional to 289,909.03, 434,904.56 and 90,249.57

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Solution

The fourth proportional to 289,909.03, 434,904.56 and 90,249.57 is: 135,387.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    289,909.03 : 434,904.56 = 90,249.57 : x
  2. Step 2: Convert to fraction form
    289,909.03/434,904.56 = 90,249.57/x
  3. Step 3: Cross multiply
    289,909.03x = 434,904.56 × 90,249.57
  4. Step 4: Simplify right side
    289,909.03x = 39,249,949,531.04
  5. Step 5: Solve for x
    x = 39,249,949,531.04/289,909.03
  6. Step 6: Final answer
    x = 135,387.12

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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.