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Finding the Fourth Proportional to 66,312.21, 91,509.90 and 36,097.78

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Solution

The fourth proportional to 66,312.21, 91,509.90 and 36,097.78 is: 49,814.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,312.21 : 91,509.90 = 36,097.78 : x
  2. Step 2: Convert to fraction form
    66,312.21/91,509.90 = 36,097.78/x
  3. Step 3: Cross multiply
    66,312.21x = 91,509.90 × 36,097.78
  4. Step 4: Simplify right side
    66,312.21x = 3,303,304,238.02
  5. Step 5: Solve for x
    x = 3,303,304,238.02/66,312.21
  6. Step 6: Final answer
    x = 49,814.42

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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.