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Finding the Fourth Proportional to 209,440.30, 314,160.45 and 120,866.80

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Solution

The fourth proportional to 209,440.30, 314,160.45 and 120,866.80 is: 181,300.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    209,440.30 : 314,160.45 = 120,866.80 : x
  2. Step 2: Convert to fraction form
    209,440.30/314,160.45 = 120,866.80/x
  3. Step 3: Cross multiply
    209,440.30x = 314,160.45 × 120,866.80
  4. Step 4: Simplify right side
    209,440.30x = 37,971,568,278.06
  5. Step 5: Solve for x
    x = 37,971,568,278.06/209,440.30
  6. Step 6: Final answer
    x = 181,300.20

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1.5x scale

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.