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Finding the Fourth Proportional to 79,167.18, 118,739.79 and 19,999.20

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Solution

The fourth proportional to 79,167.18, 118,739.79 and 19,999.20 is: 29,996.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,167.18 : 118,739.79 = 19,999.20 : x
  2. Step 2: Convert to fraction form
    79,167.18/118,739.79 = 19,999.20/x
  3. Step 3: Cross multiply
    79,167.18x = 118,739.79 × 19,999.20
  4. Step 4: Simplify right side
    79,167.18x = 2,374,700,808.17
  5. Step 5: Solve for x
    x = 2,374,700,808.17/79,167.18
  6. Step 6: Final answer
    x = 29,996.03

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1.5x scale

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.