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Finding the Fourth Proportional to 57,007.80, 85,365.90 and 42,136.20

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Solution

The fourth proportional to 57,007.80, 85,365.90 and 42,136.20 is: 63,096.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    57,007.80 : 85,365.90 = 42,136.20 : x
  2. Step 2: Convert to fraction form
    57,007.80/85,365.90 = 42,136.20/x
  3. Step 3: Cross multiply
    57,007.80x = 85,365.90 × 42,136.20
  4. Step 4: Simplify right side
    57,007.80x = 3,596,994,635.58
  5. Step 5: Solve for x
    x = 3,596,994,635.58/57,007.80
  6. Step 6: Final answer
    x = 63,096.53

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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.