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Finding the Fourth Proportional to 66,605.80, 99,779.10 and 40,232.20

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Solution

The fourth proportional to 66,605.80, 99,779.10 and 40,232.20 is: 60,270.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,605.80 : 99,779.10 = 40,232.20 : x
  2. Step 2: Convert to fraction form
    66,605.80/99,779.10 = 40,232.20/x
  3. Step 3: Cross multiply
    66,605.80x = 99,779.10 × 40,232.20
  4. Step 4: Simplify right side
    66,605.80x = 4,014,332,707.02
  5. Step 5: Solve for x
    x = 4,014,332,707.02/66,605.80
  6. Step 6: Final answer
    x = 60,270.02

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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.