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Finding the Fourth Proportional to 101,270.81, 139,753.73 and 56,558.81

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Solution

The fourth proportional to 101,270.81, 139,753.73 and 56,558.81 is: 78,051.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    101,270.81 : 139,753.73 = 56,558.81 : x
  2. Step 2: Convert to fraction form
    101,270.81/139,753.73 = 56,558.81/x
  3. Step 3: Cross multiply
    101,270.81x = 139,753.73 × 56,558.81
  4. Step 4: Simplify right side
    101,270.81x = 7,904,304,728.45
  5. Step 5: Solve for x
    x = 7,904,304,728.45/101,270.81
  6. Step 6: Final answer
    x = 78,051.16

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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.