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Finding the Fourth Proportional to 86,692.72, 130,037.16 and 39,945.58

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Solution

The fourth proportional to 86,692.72, 130,037.16 and 39,945.58 is: 59,917.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,692.72 : 130,037.16 = 39,945.58 : x
  2. Step 2: Convert to fraction form
    86,692.72/130,037.16 = 39,945.58/x
  3. Step 3: Cross multiply
    86,692.72x = 130,037.16 × 39,945.58
  4. Step 4: Simplify right side
    86,692.72x = 5,194,409,777.75
  5. Step 5: Solve for x
    x = 5,194,409,777.75/86,692.72
  6. Step 6: Final answer
    x = 59,917.49

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.