Home / 209,397.15-288,966.75-113,904.21

Finding the Fourth Proportional to 209,397.15, 288,966.75 and 113,904.21

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Solution

The fourth proportional to 209,397.15, 288,966.75 and 113,904.21 is: 157,187.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    209,397.15 : 288,966.75 = 113,904.21 : x
  2. Step 2: Convert to fraction form
    209,397.15/288,966.75 = 113,904.21/x
  3. Step 3: Cross multiply
    209,397.15x = 288,966.75 × 113,904.21
  4. Step 4: Simplify right side
    209,397.15x = 32,914,529,375.02
  5. Step 5: Solve for x
    x = 32,914,529,375.02/209,397.15
  6. Step 6: Final answer
    x = 157,187.09

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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.