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Finding the Fourth Proportional to 101,098.13, 139,523.15 and 55,784.85

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Solution

The fourth proportional to 101,098.13, 139,523.15 and 55,784.85 is: 76,987.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    101,098.13 : 139,523.15 = 55,784.85 : x
  2. Step 2: Convert to fraction form
    101,098.13/139,523.15 = 55,784.85/x
  3. Step 3: Cross multiply
    101,098.13x = 139,523.15 × 55,784.85
  4. Step 4: Simplify right side
    101,098.13x = 7,783,277,715.35
  5. Step 5: Solve for x
    x = 7,783,277,715.35/101,098.13
  6. Step 6: Final answer
    x = 76,987.36

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1.5x scale

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.