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Finding the Fourth Proportional to 153,372.61, 211,639.13 and 89,697.97

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Solution

The fourth proportional to 153,372.61, 211,639.13 and 89,697.97 is: 123,774.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    153,372.61 : 211,639.13 = 89,697.97 : x
  2. Step 2: Convert to fraction form
    153,372.61/211,639.13 = 89,697.97/x
  3. Step 3: Cross multiply
    153,372.61x = 211,639.13 × 89,697.97
  4. Step 4: Simplify right side
    153,372.61x = 18,983,599,885.08
  5. Step 5: Solve for x
    x = 18,983,599,885.08/153,372.61
  6. Step 6: Final answer
    x = 123,774.38

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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.