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Finding the Fourth Proportional to 103,665.78, 143,051.46 and 63,390.96

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Solution

The fourth proportional to 103,665.78, 143,051.46 and 63,390.96 is: 87,475.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,665.78 : 143,051.46 = 63,390.96 : x
  2. Step 2: Convert to fraction form
    103,665.78/143,051.46 = 63,390.96/x
  3. Step 3: Cross multiply
    103,665.78x = 143,051.46 × 63,390.96
  4. Step 4: Simplify right side
    103,665.78x = 9,068,169,378.80
  5. Step 5: Solve for x
    x = 9,068,169,378.80/103,665.78
  6. Step 6: Final answer
    x = 87,475.05

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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.