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Finding the Fourth Proportional to 85,843.24, 128,598.80 and 48,289.20

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Solution

The fourth proportional to 85,843.24, 128,598.80 and 48,289.20 is: 72,340.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,843.24 : 128,598.80 = 48,289.20 : x
  2. Step 2: Convert to fraction form
    85,843.24/128,598.80 = 48,289.20/x
  3. Step 3: Cross multiply
    85,843.24x = 128,598.80 × 48,289.20
  4. Step 4: Simplify right side
    85,843.24x = 6,209,933,172.96
  5. Step 5: Solve for x
    x = 6,209,933,172.96/85,843.24
  6. Step 6: Final answer
    x = 72,340.39

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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.