Home / 189,478.12-284,112.68-77,129.50

Finding the Fourth Proportional to 189,478.12, 284,112.68 and 77,129.50

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Solution

The fourth proportional to 189,478.12, 284,112.68 and 77,129.50 is: 115,651.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    189,478.12 : 284,112.68 = 77,129.50 : x
  2. Step 2: Convert to fraction form
    189,478.12/284,112.68 = 77,129.50/x
  3. Step 3: Cross multiply
    189,478.12x = 284,112.68 × 77,129.50
  4. Step 4: Simplify right side
    189,478.12x = 21,913,468,952.06
  5. Step 5: Solve for x
    x = 21,913,468,952.06/189,478.12
  6. Step 6: Final answer
    x = 115,651.71

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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.