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Finding the Fourth Proportional to 101,364.15, 139,876.88 and 56,039.48

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Solution

The fourth proportional to 101,364.15, 139,876.88 and 56,039.48 is: 77,331.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    101,364.15 : 139,876.88 = 56,039.48 : x
  2. Step 2: Convert to fraction form
    101,364.15/139,876.88 = 56,039.48/x
  3. Step 3: Cross multiply
    101,364.15x = 139,876.88 × 56,039.48
  4. Step 4: Simplify right side
    101,364.15x = 7,838,627,754.28
  5. Step 5: Solve for x
    x = 7,838,627,754.28/101,364.15
  6. Step 6: Final answer
    x = 77,331.36

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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.