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Finding the Fourth Proportional to 66,302.20, 99,485.70 and 31,235.80

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Solution

The fourth proportional to 66,302.20, 99,485.70 and 31,235.80 is: 46,868.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,302.20 : 99,485.70 = 31,235.80 : x
  2. Step 2: Convert to fraction form
    66,302.20/99,485.70 = 31,235.80/x
  3. Step 3: Cross multiply
    66,302.20x = 99,485.70 × 31,235.80
  4. Step 4: Simplify right side
    66,302.20x = 3,107,515,428.06
  5. Step 5: Solve for x
    x = 3,107,515,428.06/66,302.20
  6. Step 6: Final answer
    x = 46,868.96

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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.