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Finding the Fourth Proportional to 103,111.62, 142,305.84 and 57,801.84

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Solution

The fourth proportional to 103,111.62, 142,305.84 and 57,801.84 is: 79,773.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,111.62 : 142,305.84 = 57,801.84 : x
  2. Step 2: Convert to fraction form
    103,111.62/142,305.84 = 57,801.84/x
  3. Step 3: Cross multiply
    103,111.62x = 142,305.84 × 57,801.84
  4. Step 4: Simplify right side
    103,111.62x = 8,225,539,394.75
  5. Step 5: Solve for x
    x = 8,225,539,394.75/103,111.62
  6. Step 6: Final answer
    x = 79,773.16

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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.