Home / 209,389.12-313,964.32-142,909.72

Finding the Fourth Proportional to 209,389.12, 313,964.32 and 142,909.72

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Solution

The fourth proportional to 209,389.12, 313,964.32 and 142,909.72 is: 214,283.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    209,389.12 : 313,964.32 = 142,909.72 : x
  2. Step 2: Convert to fraction form
    209,389.12/313,964.32 = 142,909.72/x
  3. Step 3: Cross multiply
    209,389.12x = 313,964.32 × 142,909.72
  4. Step 4: Simplify right side
    209,389.12x = 44,868,553,061.19
  5. Step 5: Solve for x
    x = 44,868,553,061.19/209,389.12
  6. Step 6: Final answer
    x = 214,283.12

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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.