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Finding the Fourth Proportional to 66,808.80, 92,203.92 and 38,515.50

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Solution

The fourth proportional to 66,808.80, 92,203.92 and 38,515.50 is: 53,155.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,808.80 : 92,203.92 = 38,515.50 : x
  2. Step 2: Convert to fraction form
    66,808.80/92,203.92 = 38,515.50/x
  3. Step 3: Cross multiply
    66,808.80x = 92,203.92 × 38,515.50
  4. Step 4: Simplify right side
    66,808.80x = 3,551,280,080.76
  5. Step 5: Solve for x
    x = 3,551,280,080.76/66,808.80
  6. Step 6: Final answer
    x = 53,155.87

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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.