Home / 189,905.90-284,680.65-71,656.70

Finding the Fourth Proportional to 189,905.90, 284,680.65 and 71,656.70

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Solution

The fourth proportional to 189,905.90, 284,680.65 and 71,656.70 is: 107,417.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    189,905.90 : 284,680.65 = 71,656.70 : x
  2. Step 2: Convert to fraction form
    189,905.90/284,680.65 = 71,656.70/x
  3. Step 3: Cross multiply
    189,905.90x = 284,680.65 × 71,656.70
  4. Step 4: Simplify right side
    189,905.90x = 20,399,275,932.86
  5. Step 5: Solve for x
    x = 20,399,275,932.86/189,905.90
  6. Step 6: Final answer
    x = 107,417.81

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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.