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Finding the Fourth Proportional to 103,879.71, 143,302.68 and 65,110.50

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Solution

The fourth proportional to 103,879.71, 143,302.68 and 65,110.50 is: 89,820.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,879.71 : 143,302.68 = 65,110.50 : x
  2. Step 2: Convert to fraction form
    103,879.71/143,302.68 = 65,110.50/x
  3. Step 3: Cross multiply
    103,879.71x = 143,302.68 × 65,110.50
  4. Step 4: Simplify right side
    103,879.71x = 9,330,509,146.14
  5. Step 5: Solve for x
    x = 9,330,509,146.14/103,879.71
  6. Step 6: Final answer
    x = 89,820.32

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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.