Home / 100,670.06-138,924.96-55,352.68

Finding the Fourth Proportional to 100,670.06, 138,924.96 and 55,352.68

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Solution

The fourth proportional to 100,670.06, 138,924.96 and 55,352.68 is: 76,386.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,670.06 : 138,924.96 = 55,352.68 : x
  2. Step 2: Convert to fraction form
    100,670.06/138,924.96 = 55,352.68/x
  3. Step 3: Cross multiply
    100,670.06x = 138,924.96 × 55,352.68
  4. Step 4: Simplify right side
    100,670.06x = 7,689,868,854.89
  5. Step 5: Solve for x
    x = 7,689,868,854.89/100,670.06
  6. Step 6: Final answer
    x = 76,386.85

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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.