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Finding the Fourth Proportional to 90,302, 124,617.66 and 54,485.08

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Solution

The fourth proportional to 90,302, 124,617.66 and 54,485.08 is: 75,189.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,302 : 124,617.66 = 54,485.08 : x
  2. Step 2: Convert to fraction form
    90,302/124,617.66 = 54,485.08/x
  3. Step 3: Cross multiply
    90,302x = 124,617.66 × 54,485.08
  4. Step 4: Simplify right side
    90,302x = 6,789,803,174.51
  5. Step 5: Solve for x
    x = 6,789,803,174.51/90,302
  6. Step 6: Final answer
    x = 75,189.95

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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.