Home / 78,662.12-108,555.74-42,854.36

Finding the Fourth Proportional to 78,662.12, 108,555.74 and 42,854.36

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Solution

The fourth proportional to 78,662.12, 108,555.74 and 42,854.36 is: 59,140.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,662.12 : 108,555.74 = 42,854.36 : x
  2. Step 2: Convert to fraction form
    78,662.12/108,555.74 = 42,854.36/x
  3. Step 3: Cross multiply
    78,662.12x = 108,555.74 × 42,854.36
  4. Step 4: Simplify right side
    78,662.12x = 4,652,086,004.98
  5. Step 5: Solve for x
    x = 4,652,086,004.98/78,662.12
  6. Step 6: Final answer
    x = 59,140.11

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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.