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Finding the Fourth Proportional to 101,382.88, 139,896.16 and 56,054.74

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Solution

The fourth proportional to 101,382.88, 139,896.16 and 56,054.74 is: 77,348.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    101,382.88 : 139,896.16 = 56,054.74 : x
  2. Step 2: Convert to fraction form
    101,382.88/139,896.16 = 56,054.74/x
  3. Step 3: Cross multiply
    101,382.88x = 139,896.16 × 56,054.74
  4. Step 4: Simplify right side
    101,382.88x = 7,841,842,875.80
  5. Step 5: Solve for x
    x = 7,841,842,875.80/101,382.88
  6. Step 6: Final answer
    x = 77,348.79

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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.