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Finding the Fourth Proportional to 57,038.40, 85,460.40 and 48,679.20

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Solution

The fourth proportional to 57,038.40, 85,460.40 and 48,679.20 is: 72,935.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    57,038.40 : 85,460.40 = 48,679.20 : x
  2. Step 2: Convert to fraction form
    57,038.40/85,460.40 = 48,679.20/x
  3. Step 3: Cross multiply
    57,038.40x = 85,460.40 × 48,679.20
  4. Step 4: Simplify right side
    57,038.40x = 4,160,143,903.68
  5. Step 5: Solve for x
    x = 4,160,143,903.68/57,038.40
  6. Step 6: Final answer
    x = 72,935.85

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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.