Home / 102,971.25-142,118.72-74,758.95

Finding the Fourth Proportional to 102,971.25, 142,118.72 and 74,758.95

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Solution

The fourth proportional to 102,971.25, 142,118.72 and 74,758.95 is: 103,180.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    102,971.25 : 142,118.72 = 74,758.95 : x
  2. Step 2: Convert to fraction form
    102,971.25/142,118.72 = 74,758.95/x
  3. Step 3: Cross multiply
    102,971.25x = 142,118.72 × 74,758.95
  4. Step 4: Simplify right side
    102,971.25x = 10,624,645,908.75
  5. Step 5: Solve for x
    x = 10,624,645,908.75/102,971.25
  6. Step 6: Final answer
    x = 103,180.70

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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.