Home / 78,947.28-117,405.56-76,455.52

Finding the Fourth Proportional to 78,947.28, 117,405.56 and 76,455.52

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Solution

The fourth proportional to 78,947.28, 117,405.56 and 76,455.52 is: 113,699.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,947.28 : 117,405.56 = 76,455.52 : x
  2. Step 2: Convert to fraction form
    78,947.28/117,405.56 = 76,455.52/x
  3. Step 3: Cross multiply
    78,947.28x = 117,405.56 × 76,455.52
  4. Step 4: Simplify right side
    78,947.28x = 8,976,303,038.32
  5. Step 5: Solve for x
    x = 8,976,303,038.32/78,947.28
  6. Step 6: Final answer
    x = 113,699.97

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.