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Finding the Fourth Proportional to 242,899.59, 364,349.40 and 85,128.03

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Solution

The fourth proportional to 242,899.59, 364,349.40 and 85,128.03 is: 127,692.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    242,899.59 : 364,349.40 = 85,128.03 : x
  2. Step 2: Convert to fraction form
    242,899.59/364,349.40 = 85,128.03/x
  3. Step 3: Cross multiply
    242,899.59x = 364,349.40 × 85,128.03
  4. Step 4: Simplify right side
    242,899.59x = 31,016,346,653.68
  5. Step 5: Solve for x
    x = 31,016,346,653.68/242,899.59
  6. Step 6: Final answer
    x = 127,692.05

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.