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Finding the Fourth Proportional to 100,883.55, 139,213.95 and 57,860.82

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Solution

The fourth proportional to 100,883.55, 139,213.95 and 57,860.82 is: 79,844.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,883.55 : 139,213.95 = 57,860.82 : x
  2. Step 2: Convert to fraction form
    100,883.55/139,213.95 = 57,860.82/x
  3. Step 3: Cross multiply
    100,883.55x = 139,213.95 × 57,860.82
  4. Step 4: Simplify right side
    100,883.55x = 8,055,033,302.44
  5. Step 5: Solve for x
    x = 8,055,033,302.44/100,883.55
  6. Step 6: Final answer
    x = 79,844.86

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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.