Home / 83,789.08-115,509.94-66,643

Finding the Fourth Proportional to 83,789.08, 115,509.94 and 66,643

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Solution

The fourth proportional to 83,789.08, 115,509.94 and 66,643 is: 91,872.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    83,789.08 : 115,509.94 = 66,643 : x
  2. Step 2: Convert to fraction form
    83,789.08/115,509.94 = 66,643/x
  3. Step 3: Cross multiply
    83,789.08x = 115,509.94 × 66,643
  4. Step 4: Simplify right side
    83,789.08x = 7,697,928,931.42
  5. Step 5: Solve for x
    x = 7,697,928,931.42/83,789.08
  6. Step 6: Final answer
    x = 91,872.70

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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.