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Finding the Fourth Proportional to 66,842.50, 92,242.65 and 39,986.14

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Solution

The fourth proportional to 66,842.50, 92,242.65 and 39,986.14 is: 55,180.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,842.50 : 92,242.65 = 39,986.14 : x
  2. Step 2: Convert to fraction form
    66,842.50/92,242.65 = 39,986.14/x
  3. Step 3: Cross multiply
    66,842.50x = 92,242.65 × 39,986.14
  4. Step 4: Simplify right side
    66,842.50x = 3,688,427,516.87
  5. Step 5: Solve for x
    x = 3,688,427,516.87/66,842.50
  6. Step 6: Final answer
    x = 55,180.87

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.