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Finding the Fourth Proportional to 98,342.78, 135,692.70 and 57,499.04

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Solution

The fourth proportional to 98,342.78, 135,692.70 and 57,499.04 is: 79,336.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    98,342.78 : 135,692.70 = 57,499.04 : x
  2. Step 2: Convert to fraction form
    98,342.78/135,692.70 = 57,499.04/x
  3. Step 3: Cross multiply
    98,342.78x = 135,692.70 × 57,499.04
  4. Step 4: Simplify right side
    98,342.78x = 7,802,199,985.01
  5. Step 5: Solve for x
    x = 7,802,199,985.01/98,342.78
  6. Step 6: Final answer
    x = 79,336.78

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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.