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Finding the Fourth Proportional to 90,343, 124,673.34 and 55,015

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Solution

The fourth proportional to 90,343, 124,673.34 and 55,015 is: 75,920.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,343 : 124,673.34 = 55,015 : x
  2. Step 2: Convert to fraction form
    90,343/124,673.34 = 55,015/x
  3. Step 3: Cross multiply
    90,343x = 124,673.34 × 55,015
  4. Step 4: Simplify right side
    90,343x = 6,858,903,800.10
  5. Step 5: Solve for x
    x = 6,858,903,800.10/90,343
  6. Step 6: Final answer
    x = 75,920.70

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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.