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Finding the Fourth Proportional to 99,761.39, 137,673.73 and 56,747.06

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Solution

The fourth proportional to 99,761.39, 137,673.73 and 56,747.06 is: 78,312.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,761.39 : 137,673.73 = 56,747.06 : x
  2. Step 2: Convert to fraction form
    99,761.39/137,673.73 = 56,747.06/x
  3. Step 3: Cross multiply
    99,761.39x = 137,673.73 × 56,747.06
  4. Step 4: Simplify right side
    99,761.39x = 7,812,579,416.73
  5. Step 5: Solve for x
    x = 7,812,579,416.73/99,761.39
  6. Step 6: Final answer
    x = 78,312.66

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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.