Home / 78,293.17-117,438.74-19,129.36

Finding the Fourth Proportional to 78,293.17, 117,438.74 and 19,129.36

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Solution

The fourth proportional to 78,293.17, 117,438.74 and 19,129.36 is: 28,693.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,293.17 : 117,438.74 = 19,129.36 : x
  2. Step 2: Convert to fraction form
    78,293.17/117,438.74 = 19,129.36/x
  3. Step 3: Cross multiply
    78,293.17x = 117,438.74 × 19,129.36
  4. Step 4: Simplify right side
    78,293.17x = 2,246,527,252.57
  5. Step 5: Solve for x
    x = 2,246,527,252.57/78,293.17
  6. Step 6: Final answer
    x = 28,693.78

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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.