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Finding the Fourth Proportional to 85,615.80, 128,390.58 and 29,445.24

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Solution

The fourth proportional to 85,615.80, 128,390.58 and 29,445.24 is: 44,156.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,615.80 : 128,390.58 = 29,445.24 : x
  2. Step 2: Convert to fraction form
    85,615.80/128,390.58 = 29,445.24/x
  3. Step 3: Cross multiply
    85,615.80x = 128,390.58 × 29,445.24
  4. Step 4: Simplify right side
    85,615.80x = 3,780,491,441.84
  5. Step 5: Solve for x
    x = 3,780,491,441.84/85,615.80
  6. Step 6: Final answer
    x = 44,156.47

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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.