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Finding the Fourth Proportional to 57,715.40, 86,500.20 and 42,114.80

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Solution

The fourth proportional to 57,715.40, 86,500.20 and 42,114.80 is: 63,119.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    57,715.40 : 86,500.20 = 42,114.80 : x
  2. Step 2: Convert to fraction form
    57,715.40/86,500.20 = 42,114.80/x
  3. Step 3: Cross multiply
    57,715.40x = 86,500.20 × 42,114.80
  4. Step 4: Simplify right side
    57,715.40x = 3,642,938,622.96
  5. Step 5: Solve for x
    x = 3,642,938,622.96/57,715.40
  6. Step 6: Final answer
    x = 63,119.01

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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.