Home / 81,007.47-121,523.54-38,879.70

Finding the Fourth Proportional to 81,007.47, 121,523.54 and 38,879.70

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Solution

The fourth proportional to 81,007.47, 121,523.54 and 38,879.70 is: 58,325.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,007.47 : 121,523.54 = 38,879.70 : x
  2. Step 2: Convert to fraction form
    81,007.47/121,523.54 = 38,879.70/x
  3. Step 3: Cross multiply
    81,007.47x = 121,523.54 × 38,879.70
  4. Step 4: Simplify right side
    81,007.47x = 4,724,798,346.72
  5. Step 5: Solve for x
    x = 4,724,798,346.72/81,007.47
  6. Step 6: Final answer
    x = 58,325.47

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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.