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Finding the Fourth Proportional to 66,289.80, 99,434.70 and 48,793.80

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Solution

The fourth proportional to 66,289.80, 99,434.70 and 48,793.80 is: 73,190.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,289.80 : 99,434.70 = 48,793.80 : x
  2. Step 2: Convert to fraction form
    66,289.80/99,434.70 = 48,793.80/x
  3. Step 3: Cross multiply
    66,289.80x = 99,434.70 × 48,793.80
  4. Step 4: Simplify right side
    66,289.80x = 4,851,796,864.86
  5. Step 5: Solve for x
    x = 4,851,796,864.86/66,289.80
  6. Step 6: Final answer
    x = 73,190.70

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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.