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Finding the Fourth Proportional to 76,370.30, 114,555.45 and 66,528.80

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Solution

The fourth proportional to 76,370.30, 114,555.45 and 66,528.80 is: 99,793.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    76,370.30 : 114,555.45 = 66,528.80 : x
  2. Step 2: Convert to fraction form
    76,370.30/114,555.45 = 66,528.80/x
  3. Step 3: Cross multiply
    76,370.30x = 114,555.45 × 66,528.80
  4. Step 4: Simplify right side
    76,370.30x = 7,621,236,621.96
  5. Step 5: Solve for x
    x = 7,621,236,621.96/76,370.30
  6. Step 6: Final answer
    x = 99,793.20

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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.