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Finding the Fourth Proportional to 85,075.57, 127,625.03 and 28,900.60

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Solution

The fourth proportional to 85,075.57, 127,625.03 and 28,900.60 is: 43,354.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,075.57 : 127,625.03 = 28,900.60 : x
  2. Step 2: Convert to fraction form
    85,075.57/127,625.03 = 28,900.60/x
  3. Step 3: Cross multiply
    85,075.57x = 127,625.03 × 28,900.60
  4. Step 4: Simplify right side
    85,075.57x = 3,688,439,942.02
  5. Step 5: Solve for x
    x = 3,688,439,942.02/85,075.57
  6. Step 6: Final answer
    x = 43,354.87

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1.5x scale

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.