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Finding the Fourth Proportional to 72,859.91, 109,289.86 and 56,244.17

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Solution

The fourth proportional to 72,859.91, 109,289.86 and 56,244.17 is: 84,366.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,859.91 : 109,289.86 = 56,244.17 : x
  2. Step 2: Convert to fraction form
    72,859.91/109,289.86 = 56,244.17/x
  3. Step 3: Cross multiply
    72,859.91x = 109,289.86 × 56,244.17
  4. Step 4: Simplify right side
    72,859.91x = 6,146,917,597.73
  5. Step 5: Solve for x
    x = 6,146,917,597.73/72,859.91
  6. Step 6: Final answer
    x = 84,366.26

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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.