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Finding the Fourth Proportional to 81,521.79, 112,509.45 and 54,296.37

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Solution

The fourth proportional to 81,521.79, 112,509.45 and 54,296.37 is: 74,935.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,521.79 : 112,509.45 = 54,296.37 : x
  2. Step 2: Convert to fraction form
    81,521.79/112,509.45 = 54,296.37/x
  3. Step 3: Cross multiply
    81,521.79x = 112,509.45 × 54,296.37
  4. Step 4: Simplify right side
    81,521.79x = 6,108,854,725.70
  5. Step 5: Solve for x
    x = 6,108,854,725.70/81,521.79
  6. Step 6: Final answer
    x = 74,935.24

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.