Home / 77,921.52-116,870.76-28,662

Finding the Fourth Proportional to 77,921.52, 116,870.76 and 28,662

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Solution

The fourth proportional to 77,921.52, 116,870.76 and 28,662 is: 42,988.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,921.52 : 116,870.76 = 28,662 : x
  2. Step 2: Convert to fraction form
    77,921.52/116,870.76 = 28,662/x
  3. Step 3: Cross multiply
    77,921.52x = 116,870.76 × 28,662
  4. Step 4: Simplify right side
    77,921.52x = 3,349,749,723.12
  5. Step 5: Solve for x
    x = 3,349,749,723.12/77,921.52
  6. Step 6: Final answer
    x = 42,988.76

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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.