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Finding the Fourth Proportional to 101,871.76, 140,579.40 and 56,551.72

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Solution

The fourth proportional to 101,871.76, 140,579.40 and 56,551.72 is: 78,039.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    101,871.76 : 140,579.40 = 56,551.72 : x
  2. Step 2: Convert to fraction form
    101,871.76/140,579.40 = 56,551.72/x
  3. Step 3: Cross multiply
    101,871.76x = 140,579.40 × 56,551.72
  4. Step 4: Simplify right side
    101,871.76x = 7,950,006,866.57
  5. Step 5: Solve for x
    x = 7,950,006,866.57/101,871.76
  6. Step 6: Final answer
    x = 78,039.36

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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.