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Finding the Fourth Proportional to 57,479.79, 79,299.60 and 42,408.63

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Solution

The fourth proportional to 57,479.79, 79,299.60 and 42,408.63 is: 58,507.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    57,479.79 : 79,299.60 = 42,408.63 : x
  2. Step 2: Convert to fraction form
    57,479.79/79,299.60 = 42,408.63/x
  3. Step 3: Cross multiply
    57,479.79x = 79,299.60 × 42,408.63
  4. Step 4: Simplify right side
    57,479.79x = 3,362,987,395.55
  5. Step 5: Solve for x
    x = 3,362,987,395.55/57,479.79
  6. Step 6: Final answer
    x = 58,507.30

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.