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Finding the Fourth Proportional to 101,372.31, 139,903.74 and 56,060.91

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Solution

The fourth proportional to 101,372.31, 139,903.74 and 56,060.91 is: 77,369.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    101,372.31 : 139,903.74 = 56,060.91 : x
  2. Step 2: Convert to fraction form
    101,372.31/139,903.74 = 56,060.91/x
  3. Step 3: Cross multiply
    101,372.31x = 139,903.74 × 56,060.91
  4. Step 4: Simplify right side
    101,372.31x = 7,843,130,976.80
  5. Step 5: Solve for x
    x = 7,843,130,976.80/101,372.31
  6. Step 6: Final answer
    x = 77,369.56

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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.