Home / 100,330.90-138,462.30-59,519.19

Finding the Fourth Proportional to 100,330.90, 138,462.30 and 59,519.19

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Solution

The fourth proportional to 100,330.90, 138,462.30 and 59,519.19 is: 82,139.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,330.90 : 138,462.30 = 59,519.19 : x
  2. Step 2: Convert to fraction form
    100,330.90/138,462.30 = 59,519.19/x
  3. Step 3: Cross multiply
    100,330.90x = 138,462.30 × 59,519.19
  4. Step 4: Simplify right side
    100,330.90x = 8,241,163,941.54
  5. Step 5: Solve for x
    x = 8,241,163,941.54/100,330.90
  6. Step 6: Final answer
    x = 82,139.84

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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.