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Finding the Fourth Proportional to 90,443.77, 124,668.60 and 71,292.49

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Solution

The fourth proportional to 90,443.77, 124,668.60 and 71,292.49 is: 98,270.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,443.77 : 124,668.60 = 71,292.49 : x
  2. Step 2: Convert to fraction form
    90,443.77/124,668.60 = 71,292.49/x
  3. Step 3: Cross multiply
    90,443.77x = 124,668.60 × 71,292.49
  4. Step 4: Simplify right side
    90,443.77x = 8,887,934,918.81
  5. Step 5: Solve for x
    x = 8,887,934,918.81/90,443.77
  6. Step 6: Final answer
    x = 98,270.28

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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.