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Finding the Fourth Proportional to 57,720.67, 86,575.32 and 28,158.91

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Solution

The fourth proportional to 57,720.67, 86,575.32 and 28,158.91 is: 42,235.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    57,720.67 : 86,575.32 = 28,158.91 : x
  2. Step 2: Convert to fraction form
    57,720.67/86,575.32 = 28,158.91/x
  3. Step 3: Cross multiply
    57,720.67x = 86,575.32 × 28,158.91
  4. Step 4: Simplify right side
    57,720.67x = 2,437,866,427.66
  5. Step 5: Solve for x
    x = 2,437,866,427.66/57,720.67
  6. Step 6: Final answer
    x = 42,235.59

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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.