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Finding the Fourth Proportional to 85,561.60, 128,309.60 and 29,391.24

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Solution

The fourth proportional to 85,561.60, 128,309.60 and 29,391.24 is: 44,075.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,561.60 : 128,309.60 = 29,391.24 : x
  2. Step 2: Convert to fraction form
    85,561.60/128,309.60 = 29,391.24/x
  3. Step 3: Cross multiply
    85,561.60x = 128,309.60 × 29,391.24
  4. Step 4: Simplify right side
    85,561.60x = 3,771,178,247.90
  5. Step 5: Solve for x
    x = 3,771,178,247.90/85,561.60
  6. Step 6: Final answer
    x = 44,075.59

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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.