Home / 209,939.30-314,908.95-121,147.10

Finding the Fourth Proportional to 209,939.30, 314,908.95 and 121,147.10

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Solution

The fourth proportional to 209,939.30, 314,908.95 and 121,147.10 is: 181,720.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    209,939.30 : 314,908.95 = 121,147.10 : x
  2. Step 2: Convert to fraction form
    209,939.30/314,908.95 = 121,147.10/x
  3. Step 3: Cross multiply
    209,939.30x = 314,908.95 × 121,147.10
  4. Step 4: Simplify right side
    209,939.30x = 38,150,306,056.55
  5. Step 5: Solve for x
    x = 38,150,306,056.55/209,939.30
  6. Step 6: Final answer
    x = 181,720.65

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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.