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Finding the Fourth Proportional to 66,539.68, 99,809.52 and 31,431.04

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Solution

The fourth proportional to 66,539.68, 99,809.52 and 31,431.04 is: 47,146.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,539.68 : 99,809.52 = 31,431.04 : x
  2. Step 2: Convert to fraction form
    66,539.68/99,809.52 = 31,431.04/x
  3. Step 3: Cross multiply
    66,539.68x = 99,809.52 × 31,431.04
  4. Step 4: Simplify right side
    66,539.68x = 3,137,117,015.50
  5. Step 5: Solve for x
    x = 3,137,117,015.50/66,539.68
  6. Step 6: Final answer
    x = 47,146.56

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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.