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Finding the Fourth Proportional to 153,398.41, 211,621.48 and 89,708.11

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Solution

The fourth proportional to 153,398.41, 211,621.48 and 89,708.11 is: 123,757.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    153,398.41 : 211,621.48 = 89,708.11 : x
  2. Step 2: Convert to fraction form
    153,398.41/211,621.48 = 89,708.11/x
  3. Step 3: Cross multiply
    153,398.41x = 211,621.48 × 89,708.11
  4. Step 4: Simplify right side
    153,398.41x = 18,984,163,006.20
  5. Step 5: Solve for x
    x = 18,984,163,006.20/153,398.41
  6. Step 6: Final answer
    x = 123,757.23

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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.