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Finding the Fourth Proportional to 90,372, 124,712.58 and 50,088

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Solution

The fourth proportional to 90,372, 124,712.58 and 50,088 is: 69,121.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,372 : 124,712.58 = 50,088 : x
  2. Step 2: Convert to fraction form
    90,372/124,712.58 = 50,088/x
  3. Step 3: Cross multiply
    90,372x = 124,712.58 × 50,088
  4. Step 4: Simplify right side
    90,372x = 6,246,603,707.04
  5. Step 5: Solve for x
    x = 6,246,603,707.04/90,372
  6. Step 6: Final answer
    x = 69,121.01

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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.