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Finding the Fourth Proportional to 101,177.90, 139,621.83 and 55,854.90

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Solution

The fourth proportional to 101,177.90, 139,621.83 and 55,854.90 is: 77,077.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    101,177.90 : 139,621.83 = 55,854.90 : x
  2. Step 2: Convert to fraction form
    101,177.90/139,621.83 = 55,854.90/x
  3. Step 3: Cross multiply
    101,177.90x = 139,621.83 × 55,854.90
  4. Step 4: Simplify right side
    101,177.90x = 7,798,563,073.19
  5. Step 5: Solve for x
    x = 7,798,563,073.19/101,177.90
  6. Step 6: Final answer
    x = 77,077.74

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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.