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Finding the Fourth Proportional to 61,579.13, 84,980.15 and 36,079.40

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Solution

The fourth proportional to 61,579.13, 84,980.15 and 36,079.40 is: 49,790.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,579.13 : 84,980.15 = 36,079.40 : x
  2. Step 2: Convert to fraction form
    61,579.13/84,980.15 = 36,079.40/x
  3. Step 3: Cross multiply
    61,579.13x = 84,980.15 × 36,079.40
  4. Step 4: Simplify right side
    61,579.13x = 3,066,032,218.61
  5. Step 5: Solve for x
    x = 3,066,032,218.61/61,579.13
  6. Step 6: Final answer
    x = 49,790.12

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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.