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Finding the Fourth Proportional to 101,102.55, 139,522.01 and 55,780.53

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Solution

The fourth proportional to 101,102.55, 139,522.01 and 55,780.53 is: 76,977.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    101,102.55 : 139,522.01 = 55,780.53 : x
  2. Step 2: Convert to fraction form
    101,102.55/139,522.01 = 55,780.53/x
  3. Step 3: Cross multiply
    101,102.55x = 139,522.01 × 55,780.53
  4. Step 4: Simplify right side
    101,102.55x = 7,782,611,385.56
  5. Step 5: Solve for x
    x = 7,782,611,385.56/101,102.55
  6. Step 6: Final answer
    x = 76,977.40

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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.