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Finding the Fourth Proportional to 72,979.17, 109,466.73 and 20,387.22

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Solution

The fourth proportional to 72,979.17, 109,466.73 and 20,387.22 is: 30,580.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,979.17 : 109,466.73 = 20,387.22 : x
  2. Step 2: Convert to fraction form
    72,979.17/109,466.73 = 20,387.22/x
  3. Step 3: Cross multiply
    72,979.17x = 109,466.73 × 20,387.22
  4. Step 4: Simplify right side
    72,979.17x = 2,231,722,307.19
  5. Step 5: Solve for x
    x = 2,231,722,307.19/72,979.17
  6. Step 6: Final answer
    x = 30,580.26

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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.