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Finding the Fourth Proportional to 90,728.24, 125,042.34 and 73,788.68

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Solution

The fourth proportional to 90,728.24, 125,042.34 and 73,788.68 is: 101,696.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,728.24 : 125,042.34 = 73,788.68 : x
  2. Step 2: Convert to fraction form
    90,728.24/125,042.34 = 73,788.68/x
  3. Step 3: Cross multiply
    90,728.24x = 125,042.34 × 73,788.68
  4. Step 4: Simplify right side
    90,728.24x = 9,226,709,212.71
  5. Step 5: Solve for x
    x = 9,226,709,212.71/90,728.24
  6. Step 6: Final answer
    x = 101,696.11

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1.5x scale

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.