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Finding the Fourth Proportional to 101,378.10, 139,895.77 and 56,052.53

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Solution

The fourth proportional to 101,378.10, 139,895.77 and 56,052.53 is: 77,349.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    101,378.10 : 139,895.77 = 56,052.53 : x
  2. Step 2: Convert to fraction form
    101,378.10/139,895.77 = 56,052.53/x
  3. Step 3: Cross multiply
    101,378.10x = 139,895.77 × 56,052.53
  4. Step 4: Simplify right side
    101,378.10x = 7,841,511,844.80
  5. Step 5: Solve for x
    x = 7,841,511,844.80/101,378.10
  6. Step 6: Final answer
    x = 77,349.17

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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.