Home / 76,947.20-115,420.80-73,318.40

Finding the Fourth Proportional to 76,947.20, 115,420.80 and 73,318.40

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Solution

The fourth proportional to 76,947.20, 115,420.80 and 73,318.40 is: 109,977.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    76,947.20 : 115,420.80 = 73,318.40 : x
  2. Step 2: Convert to fraction form
    76,947.20/115,420.80 = 73,318.40/x
  3. Step 3: Cross multiply
    76,947.20x = 115,420.80 × 73,318.40
  4. Step 4: Simplify right side
    76,947.20x = 8,462,468,382.72
  5. Step 5: Solve for x
    x = 8,462,468,382.72/76,947.20
  6. Step 6: Final answer
    x = 109,977.60

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.