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Finding the Fourth Proportional to 66,072.60, 99,108.90 and 31,080.60

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Solution

The fourth proportional to 66,072.60, 99,108.90 and 31,080.60 is: 46,620.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,072.60 : 99,108.90 = 31,080.60 : x
  2. Step 2: Convert to fraction form
    66,072.60/99,108.90 = 31,080.60/x
  3. Step 3: Cross multiply
    66,072.60x = 99,108.90 × 31,080.60
  4. Step 4: Simplify right side
    66,072.60x = 3,080,364,077.34
  5. Step 5: Solve for x
    x = 3,080,364,077.34/66,072.60
  6. Step 6: Final answer
    x = 46,620.90

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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.