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Finding the Fourth Proportional to 110,453.19, 152,418.15 and 65,128.98

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Solution

The fourth proportional to 110,453.19, 152,418.15 and 65,128.98 is: 89,873.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    110,453.19 : 152,418.15 = 65,128.98 : x
  2. Step 2: Convert to fraction form
    110,453.19/152,418.15 = 65,128.98/x
  3. Step 3: Cross multiply
    110,453.19x = 152,418.15 × 65,128.98
  4. Step 4: Simplify right side
    110,453.19x = 9,926,837,555.25
  5. Step 5: Solve for x
    x = 9,926,837,555.25/110,453.19
  6. Step 6: Final answer
    x = 89,873.71

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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.