Home / 189,438.72-261,378.12-108,889.20

Finding the Fourth Proportional to 189,438.72, 261,378.12 and 108,889.20

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Solution

The fourth proportional to 189,438.72, 261,378.12 and 108,889.20 is: 150,239.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    189,438.72 : 261,378.12 = 108,889.20 : x
  2. Step 2: Convert to fraction form
    189,438.72/261,378.12 = 108,889.20/x
  3. Step 3: Cross multiply
    189,438.72x = 261,378.12 × 108,889.20
  4. Step 4: Simplify right side
    189,438.72x = 28,461,254,384.30
  5. Step 5: Solve for x
    x = 28,461,254,384.30/189,438.72
  6. Step 6: Final answer
    x = 150,239.90

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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.