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Finding the Fourth Proportional to 61,398.18, 84,728.26 and 34,540.40

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Solution

The fourth proportional to 61,398.18, 84,728.26 and 34,540.40 is: 47,665.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,398.18 : 84,728.26 = 34,540.40 : x
  2. Step 2: Convert to fraction form
    61,398.18/84,728.26 = 34,540.40/x
  3. Step 3: Cross multiply
    61,398.18x = 84,728.26 × 34,540.40
  4. Step 4: Simplify right side
    61,398.18x = 2,926,547,991.70
  5. Step 5: Solve for x
    x = 2,926,547,991.70/61,398.18
  6. Step 6: Final answer
    x = 47,665.06

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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.