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Finding the Fourth Proportional to 69,065.31, 103,587.71 and 19,140.20

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Solution

The fourth proportional to 69,065.31, 103,587.71 and 19,140.20 is: 28,707.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    69,065.31 : 103,587.71 = 19,140.20 : x
  2. Step 2: Convert to fraction form
    69,065.31/103,587.71 = 19,140.20/x
  3. Step 3: Cross multiply
    69,065.31x = 103,587.71 × 19,140.20
  4. Step 4: Simplify right side
    69,065.31x = 1,982,689,486.94
  5. Step 5: Solve for x
    x = 1,982,689,486.94/69,065.31
  6. Step 6: Final answer
    x = 28,707.46

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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.