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Finding the Fourth Proportional to 71,995.64, 107,981.16 and 19,392.83

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Solution

The fourth proportional to 71,995.64, 107,981.16 and 19,392.83 is: 29,085.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,995.64 : 107,981.16 = 19,392.83 : x
  2. Step 2: Convert to fraction form
    71,995.64/107,981.16 = 19,392.83/x
  3. Step 3: Cross multiply
    71,995.64x = 107,981.16 × 19,392.83
  4. Step 4: Simplify right side
    71,995.64x = 2,094,059,746.06
  5. Step 5: Solve for x
    x = 2,094,059,746.06/71,995.64
  6. Step 6: Final answer
    x = 29,085.92

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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.