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Finding the Fourth Proportional to 101,381.88, 139,894.78 and 56,053.74

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Solution

The fourth proportional to 101,381.88, 139,894.78 and 56,053.74 is: 77,347.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    101,381.88 : 139,894.78 = 56,053.74 : x
  2. Step 2: Convert to fraction form
    101,381.88/139,894.78 = 56,053.74/x
  3. Step 3: Cross multiply
    101,381.88x = 139,894.78 × 56,053.74
  4. Step 4: Simplify right side
    101,381.88x = 7,841,625,625.48
  5. Step 5: Solve for x
    x = 7,841,625,625.48/101,381.88
  6. Step 6: Final answer
    x = 77,347.41

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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.