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Finding the Fourth Proportional to 153,563.87, 211,913.01 and 89,034.30

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Solution

The fourth proportional to 153,563.87, 211,913.01 and 89,034.30 is: 122,864.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    153,563.87 : 211,913.01 = 89,034.30 : x
  2. Step 2: Convert to fraction form
    153,563.87/211,913.01 = 89,034.30/x
  3. Step 3: Cross multiply
    153,563.87x = 211,913.01 × 89,034.30
  4. Step 4: Simplify right side
    153,563.87x = 18,867,526,506.24
  5. Step 5: Solve for x
    x = 18,867,526,506.24/153,563.87
  6. Step 6: Final answer
    x = 122,864.36

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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.