Home / 69,090.61-103,635.93-19,170.72

Finding the Fourth Proportional to 69,090.61, 103,635.93 and 19,170.72

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Solution

The fourth proportional to 69,090.61, 103,635.93 and 19,170.72 is: 28,756.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    69,090.61 : 103,635.93 = 19,170.72 : x
  2. Step 2: Convert to fraction form
    69,090.61/103,635.93 = 19,170.72/x
  3. Step 3: Cross multiply
    69,090.61x = 103,635.93 × 19,170.72
  4. Step 4: Simplify right side
    69,090.61x = 1,986,774,781.94
  5. Step 5: Solve for x
    x = 1,986,774,781.94/69,090.61
  6. Step 6: Final answer
    x = 28,756.08

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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.