Home / 103,560.43-142,961.52-78,077.11

Finding the Fourth Proportional to 103,560.43, 142,961.52 and 78,077.11

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Solution

The fourth proportional to 103,560.43, 142,961.52 and 78,077.11 is: 107,782.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,560.43 : 142,961.52 = 78,077.11 : x
  2. Step 2: Convert to fraction form
    103,560.43/142,961.52 = 78,077.11/x
  3. Step 3: Cross multiply
    103,560.43x = 142,961.52 × 78,077.11
  4. Step 4: Simplify right side
    103,560.43x = 11,162,022,322.81
  5. Step 5: Solve for x
    x = 11,162,022,322.81/103,560.43
  6. Step 6: Final answer
    x = 107,782.70

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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.