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Finding the Fourth Proportional to 57,679.20, 86,518.80 and 35,420.40

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Solution

The fourth proportional to 57,679.20, 86,518.80 and 35,420.40 is: 53,130.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    57,679.20 : 86,518.80 = 35,420.40 : x
  2. Step 2: Convert to fraction form
    57,679.20/86,518.80 = 35,420.40/x
  3. Step 3: Cross multiply
    57,679.20x = 86,518.80 × 35,420.40
  4. Step 4: Simplify right side
    57,679.20x = 3,064,530,503.52
  5. Step 5: Solve for x
    x = 3,064,530,503.52/57,679.20
  6. Step 6: Final answer
    x = 53,130.60

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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.