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Finding the Fourth Proportional to 66,809.80, 92,205.30 and 38,516.50

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Solution

The fourth proportional to 66,809.80, 92,205.30 and 38,516.50 is: 53,157.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,809.80 : 92,205.30 = 38,516.50 : x
  2. Step 2: Convert to fraction form
    66,809.80/92,205.30 = 38,516.50/x
  3. Step 3: Cross multiply
    66,809.80x = 92,205.30 × 38,516.50
  4. Step 4: Simplify right side
    66,809.80x = 3,551,425,437.45
  5. Step 5: Solve for x
    x = 3,551,425,437.45/66,809.80
  6. Step 6: Final answer
    x = 53,157.25

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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.