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Finding the Fourth Proportional to 66,085.70, 99,149.90 and 30,570.32

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Solution

The fourth proportional to 66,085.70, 99,149.90 and 30,570.32 is: 45,865.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,085.70 : 99,149.90 = 30,570.32 : x
  2. Step 2: Convert to fraction form
    66,085.70/99,149.90 = 30,570.32/x
  3. Step 3: Cross multiply
    66,085.70x = 99,149.90 × 30,570.32
  4. Step 4: Simplify right side
    66,085.70x = 3,031,043,751.64
  5. Step 5: Solve for x
    x = 3,031,043,751.64/66,085.70
  6. Step 6: Final answer
    x = 45,865.35

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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.