Home / 189,775.31-261,909.05-109,206.23

Finding the Fourth Proportional to 189,775.31, 261,909.05 and 109,206.23

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Solution

The fourth proportional to 189,775.31, 261,909.05 and 109,206.23 is: 150,715.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    189,775.31 : 261,909.05 = 109,206.23 : x
  2. Step 2: Convert to fraction form
    189,775.31/261,909.05 = 109,206.23/x
  3. Step 3: Cross multiply
    189,775.31x = 261,909.05 × 109,206.23
  4. Step 4: Simplify right side
    189,775.31x = 28,602,098,097.81
  5. Step 5: Solve for x
    x = 28,602,098,097.81/189,775.31
  6. Step 6: Final answer
    x = 150,715.60

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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.