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Finding the Fourth Proportional to 89,967.78, 124,170.50 and 53,673.91

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Solution

The fourth proportional to 89,967.78, 124,170.50 and 53,673.91 is: 74,078.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    89,967.78 : 124,170.50 = 53,673.91 : x
  2. Step 2: Convert to fraction form
    89,967.78/124,170.50 = 53,673.91/x
  3. Step 3: Cross multiply
    89,967.78x = 124,170.50 × 53,673.91
  4. Step 4: Simplify right side
    89,967.78x = 6,664,716,065.41
  5. Step 5: Solve for x
    x = 6,664,716,065.41/89,967.78
  6. Step 6: Final answer
    x = 74,078.92

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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.