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Finding the Fourth Proportional to 101,615, 140,226.80 and 56,291.98

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Solution

The fourth proportional to 101,615, 140,226.80 and 56,291.98 is: 77,681.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    101,615 : 140,226.80 = 56,291.98 : x
  2. Step 2: Convert to fraction form
    101,615/140,226.80 = 56,291.98/x
  3. Step 3: Cross multiply
    101,615x = 140,226.80 × 56,291.98
  4. Step 4: Simplify right side
    101,615x = 7,893,644,221.06
  5. Step 5: Solve for x
    x = 7,893,644,221.06/101,615
  6. Step 6: Final answer
    x = 77,681.88

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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.