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Finding the Fourth Proportional to 101,436.44, 139,979.76 and 56,116.94

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Solution

The fourth proportional to 101,436.44, 139,979.76 and 56,116.94 is: 77,439.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    101,436.44 : 139,979.76 = 56,116.94 : x
  2. Step 2: Convert to fraction form
    101,436.44/139,979.76 = 56,116.94/x
  3. Step 3: Cross multiply
    101,436.44x = 139,979.76 × 56,116.94
  4. Step 4: Simplify right side
    101,436.44x = 7,855,235,793.13
  5. Step 5: Solve for x
    x = 7,855,235,793.13/101,436.44
  6. Step 6: Final answer
    x = 77,439.98

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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.