Home / 209,405.16-288,979.98-113,912.40

Finding the Fourth Proportional to 209,405.16, 288,979.98 and 113,912.40

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Solution

The fourth proportional to 209,405.16, 288,979.98 and 113,912.40 is: 157,199.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    209,405.16 : 288,979.98 = 113,912.40 : x
  2. Step 2: Convert to fraction form
    209,405.16/288,979.98 = 113,912.40/x
  3. Step 3: Cross multiply
    209,405.16x = 288,979.98 × 113,912.40
  4. Step 4: Simplify right side
    209,405.16x = 32,918,403,073.75
  5. Step 5: Solve for x
    x = 32,918,403,073.75/209,405.16
  6. Step 6: Final answer
    x = 157,199.58

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.