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Finding the Fourth Proportional to 85,370.58, 128,075.99 and 29,211.30

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Solution

The fourth proportional to 85,370.58, 128,075.99 and 29,211.30 is: 43,823.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,370.58 : 128,075.99 = 29,211.30 : x
  2. Step 2: Convert to fraction form
    85,370.58/128,075.99 = 29,211.30/x
  3. Step 3: Cross multiply
    85,370.58x = 128,075.99 × 29,211.30
  4. Step 4: Simplify right side
    85,370.58x = 3,741,266,020.63
  5. Step 5: Solve for x
    x = 3,741,266,020.63/85,370.58
  6. Step 6: Final answer
    x = 43,823.83

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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.