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Finding the Fourth Proportional to 103,354.78, 142,645.19 and 63,091.98

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Solution

The fourth proportional to 103,354.78, 142,645.19 and 63,091.98 is: 87,076.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,354.78 : 142,645.19 = 63,091.98 : x
  2. Step 2: Convert to fraction form
    103,354.78/142,645.19 = 63,091.98/x
  3. Step 3: Cross multiply
    103,354.78x = 142,645.19 × 63,091.98
  4. Step 4: Simplify right side
    103,354.78x = 8,999,767,474.58
  5. Step 5: Solve for x
    x = 8,999,767,474.58/103,354.78
  6. Step 6: Final answer
    x = 87,076.45

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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.