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Finding the Fourth Proportional to 101,254.80, 139,728.78 and 55,931.94

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Solution

The fourth proportional to 101,254.80, 139,728.78 and 55,931.94 is: 77,184.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    101,254.80 : 139,728.78 = 55,931.94 : x
  2. Step 2: Convert to fraction form
    101,254.80/139,728.78 = 55,931.94/x
  3. Step 3: Cross multiply
    101,254.80x = 139,728.78 × 55,931.94
  4. Step 4: Simplify right side
    101,254.80x = 7,815,301,739.23
  5. Step 5: Solve for x
    x = 7,815,301,739.23/101,254.80
  6. Step 6: Final answer
    x = 77,184.51

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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.