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Finding the Fourth Proportional to 79,243.56, 118,872.69 and 28,655.24

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Solution

The fourth proportional to 79,243.56, 118,872.69 and 28,655.24 is: 42,985.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,243.56 : 118,872.69 = 28,655.24 : x
  2. Step 2: Convert to fraction form
    79,243.56/118,872.69 = 28,655.24/x
  3. Step 3: Cross multiply
    79,243.56x = 118,872.69 × 28,655.24
  4. Step 4: Simplify right side
    79,243.56x = 3,406,325,461.40
  5. Step 5: Solve for x
    x = 3,406,325,461.40/79,243.56
  6. Step 6: Final answer
    x = 42,985.52

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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.