Home / 103,138.54-142,288.62-62,837.56

Finding the Fourth Proportional to 103,138.54, 142,288.62 and 62,837.56

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Solution

The fourth proportional to 103,138.54, 142,288.62 and 62,837.56 is: 86,689.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,138.54 : 142,288.62 = 62,837.56 : x
  2. Step 2: Convert to fraction form
    103,138.54/142,288.62 = 62,837.56/x
  3. Step 3: Cross multiply
    103,138.54x = 142,288.62 × 62,837.56
  4. Step 4: Simplify right side
    103,138.54x = 8,941,069,696.57
  5. Step 5: Solve for x
    x = 8,941,069,696.57/103,138.54
  6. Step 6: Final answer
    x = 86,689.90

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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.