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Finding the Fourth Proportional to 90,338, 124,666.44 and 55,010

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Solution

The fourth proportional to 90,338, 124,666.44 and 55,010 is: 75,913.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,338 : 124,666.44 = 55,010 : x
  2. Step 2: Convert to fraction form
    90,338/124,666.44 = 55,010/x
  3. Step 3: Cross multiply
    90,338x = 124,666.44 × 55,010
  4. Step 4: Simplify right side
    90,338x = 6,857,900,864.40
  5. Step 5: Solve for x
    x = 6,857,900,864.40/90,338
  6. Step 6: Final answer
    x = 75,913.80

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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.