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Finding the Fourth Proportional to 90,751.06, 125,218.11 and 53,018.02

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Solution

The fourth proportional to 90,751.06, 125,218.11 and 53,018.02 is: 73,154.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,751.06 : 125,218.11 = 53,018.02 : x
  2. Step 2: Convert to fraction form
    90,751.06/125,218.11 = 53,018.02/x
  3. Step 3: Cross multiply
    90,751.06x = 125,218.11 × 53,018.02
  4. Step 4: Simplify right side
    90,751.06x = 6,638,816,260.34
  5. Step 5: Solve for x
    x = 6,638,816,260.34/90,751.06
  6. Step 6: Final answer
    x = 73,154.15

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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.