Home / 52,121.60-78,157.76-18,835.20

Finding the Fourth Proportional to 52,121.60, 78,157.76 and 18,835.20

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Solution

The fourth proportional to 52,121.60, 78,157.76 and 18,835.20 is: 28,243.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    52,121.60 : 78,157.76 = 18,835.20 : x
  2. Step 2: Convert to fraction form
    52,121.60/78,157.76 = 18,835.20/x
  3. Step 3: Cross multiply
    52,121.60x = 78,157.76 × 18,835.20
  4. Step 4: Simplify right side
    52,121.60x = 1,472,117,041.15
  5. Step 5: Solve for x
    x = 1,472,117,041.15/52,121.60
  6. Step 6: Final answer
    x = 28,243.90

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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.