Home / 290,428.05-435,522.16-126,121.13

Finding the Fourth Proportional to 290,428.05, 435,522.16 and 126,121.13

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Solution

The fourth proportional to 290,428.05, 435,522.16 and 126,121.13 is: 189,129.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    290,428.05 : 435,522.16 = 126,121.13 : x
  2. Step 2: Convert to fraction form
    290,428.05/435,522.16 = 126,121.13/x
  3. Step 3: Cross multiply
    290,428.05x = 435,522.16 × 126,121.13
  4. Step 4: Simplify right side
    290,428.05x = 54,928,549,065.40
  5. Step 5: Solve for x
    x = 54,928,549,065.40/290,428.05
  6. Step 6: Final answer
    x = 189,129.63

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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.