Home / 78,330.16-117,470.36-25,727.40

Finding the Fourth Proportional to 78,330.16, 117,470.36 and 25,727.40

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Solution

The fourth proportional to 78,330.16, 117,470.36 and 25,727.40 is: 38,582.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,330.16 : 117,470.36 = 25,727.40 : x
  2. Step 2: Convert to fraction form
    78,330.16/117,470.36 = 25,727.40/x
  3. Step 3: Cross multiply
    78,330.16x = 117,470.36 × 25,727.40
  4. Step 4: Simplify right side
    78,330.16x = 3,022,206,939.86
  5. Step 5: Solve for x
    x = 3,022,206,939.86/78,330.16
  6. Step 6: Final answer
    x = 38,582.93

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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.