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Finding the Fourth Proportional to 99,289.60, 148,934.40 and 80,627.20

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Solution

The fourth proportional to 99,289.60, 148,934.40 and 80,627.20 is: 120,940.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,289.60 : 148,934.40 = 80,627.20 : x
  2. Step 2: Convert to fraction form
    99,289.60/148,934.40 = 80,627.20/x
  3. Step 3: Cross multiply
    99,289.60x = 148,934.40 × 80,627.20
  4. Step 4: Simplify right side
    99,289.60x = 12,008,163,655.68
  5. Step 5: Solve for x
    x = 12,008,163,655.68/99,289.60
  6. Step 6: Final answer
    x = 120,940.80

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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.