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Finding the Fourth Proportional to 103,642.73, 143,046.54 and 64,898.54

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Solution

The fourth proportional to 103,642.73, 143,046.54 and 64,898.54 is: 89,572.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,642.73 : 143,046.54 = 64,898.54 : x
  2. Step 2: Convert to fraction form
    103,642.73/143,046.54 = 64,898.54/x
  3. Step 3: Cross multiply
    103,642.73x = 143,046.54 × 64,898.54
  4. Step 4: Simplify right side
    103,642.73x = 9,283,512,095.35
  5. Step 5: Solve for x
    x = 9,283,512,095.35/103,642.73
  6. Step 6: Final answer
    x = 89,572.25

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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.