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Finding the Fourth Proportional to 101,269.76, 139,753.30 and 70,687.30

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Solution

The fourth proportional to 101,269.76, 139,753.30 and 70,687.30 is: 97,549.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    101,269.76 : 139,753.30 = 70,687.30 : x
  2. Step 2: Convert to fraction form
    101,269.76/139,753.30 = 70,687.30/x
  3. Step 3: Cross multiply
    101,269.76x = 139,753.30 × 70,687.30
  4. Step 4: Simplify right side
    101,269.76x = 9,878,783,311.56
  5. Step 5: Solve for x
    x = 9,878,783,311.56/101,269.76
  6. Step 6: Final answer
    x = 97,549.19

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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.