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Finding the Fourth Proportional to 90,564.51, 135,803.07 and 37,959.87

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Solution

The fourth proportional to 90,564.51, 135,803.07 and 37,959.87 is: 56,921.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,564.51 : 135,803.07 = 37,959.87 : x
  2. Step 2: Convert to fraction form
    90,564.51/135,803.07 = 37,959.87/x
  3. Step 3: Cross multiply
    90,564.51x = 135,803.07 × 37,959.87
  4. Step 4: Simplify right side
    90,564.51x = 5,155,066,882.80
  5. Step 5: Solve for x
    x = 5,155,066,882.80/90,564.51
  6. Step 6: Final answer
    x = 56,921.49

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.