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Finding the Fourth Proportional to 71,935.80, 107,903.52 and 19,345.28

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Solution

The fourth proportional to 71,935.80, 107,903.52 and 19,345.28 is: 29,017.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,935.80 : 107,903.52 = 19,345.28 : x
  2. Step 2: Convert to fraction form
    71,935.80/107,903.52 = 19,345.28/x
  3. Step 3: Cross multiply
    71,935.80x = 107,903.52 × 19,345.28
  4. Step 4: Simplify right side
    71,935.80x = 2,087,423,807.39
  5. Step 5: Solve for x
    x = 2,087,423,807.39/71,935.80
  6. Step 6: Final answer
    x = 29,017.87

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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.