Home / 83,788.08-115,508.56-66,642

Finding the Fourth Proportional to 83,788.08, 115,508.56 and 66,642

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Solution

The fourth proportional to 83,788.08, 115,508.56 and 66,642 is: 91,871.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    83,788.08 : 115,508.56 = 66,642 : x
  2. Step 2: Convert to fraction form
    83,788.08/115,508.56 = 66,642/x
  3. Step 3: Cross multiply
    83,788.08x = 115,508.56 × 66,642
  4. Step 4: Simplify right side
    83,788.08x = 7,697,721,455.52
  5. Step 5: Solve for x
    x = 7,697,721,455.52/83,788.08
  6. Step 6: Final answer
    x = 91,871.32

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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.