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Finding the Fourth Proportional to 103,418.67, 142,733.16 and 63,155.79

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Solution

The fourth proportional to 103,418.67, 142,733.16 and 63,155.79 is: 87,164.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,418.67 : 142,733.16 = 63,155.79 : x
  2. Step 2: Convert to fraction form
    103,418.67/142,733.16 = 63,155.79/x
  3. Step 3: Cross multiply
    103,418.67x = 142,733.16 × 63,155.79
  4. Step 4: Simplify right side
    103,418.67x = 9,014,425,479.00
  5. Step 5: Solve for x
    x = 9,014,425,479.00/103,418.67
  6. Step 6: Final answer
    x = 87,164.39

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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.