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Finding the Fourth Proportional to 72,873.91, 109,310.88 and 56,258.20

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Solution

The fourth proportional to 72,873.91, 109,310.88 and 56,258.20 is: 84,387.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,873.91 : 109,310.88 = 56,258.20 : x
  2. Step 2: Convert to fraction form
    72,873.91/109,310.88 = 56,258.20/x
  3. Step 3: Cross multiply
    72,873.91x = 109,310.88 × 56,258.20
  4. Step 4: Simplify right side
    72,873.91x = 6,149,632,802.66
  5. Step 5: Solve for x
    x = 6,149,632,802.66/72,873.91
  6. Step 6: Final answer
    x = 84,387.31

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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.