Home / 82,879.20-124,318.80-51,386.40

Finding the Fourth Proportional to 82,879.20, 124,318.80 and 51,386.40

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Solution

The fourth proportional to 82,879.20, 124,318.80 and 51,386.40 is: 77,079.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    82,879.20 : 124,318.80 = 51,386.40 : x
  2. Step 2: Convert to fraction form
    82,879.20/124,318.80 = 51,386.40/x
  3. Step 3: Cross multiply
    82,879.20x = 124,318.80 × 51,386.40
  4. Step 4: Simplify right side
    82,879.20x = 6,388,295,584.32
  5. Step 5: Solve for x
    x = 6,388,295,584.32/82,879.20
  6. Step 6: Final answer
    x = 77,079.60

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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.