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Finding the Fourth Proportional to 78,246.83, 108,022.48 and 61,214.87

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Solution

The fourth proportional to 78,246.83, 108,022.48 and 61,214.87 is: 84,509.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,246.83 : 108,022.48 = 61,214.87 : x
  2. Step 2: Convert to fraction form
    78,246.83/108,022.48 = 61,214.87/x
  3. Step 3: Cross multiply
    78,246.83x = 108,022.48 × 61,214.87
  4. Step 4: Simplify right side
    78,246.83x = 6,612,582,187.30
  5. Step 5: Solve for x
    x = 6,612,582,187.30/78,246.83
  6. Step 6: Final answer
    x = 84,509.26

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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.