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Finding the Fourth Proportional to 66,758.16, 92,119.96 and 39,895.32

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Solution

The fourth proportional to 66,758.16, 92,119.96 and 39,895.32 is: 55,051.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,758.16 : 92,119.96 = 39,895.32 : x
  2. Step 2: Convert to fraction form
    66,758.16/92,119.96 = 39,895.32/x
  3. Step 3: Cross multiply
    66,758.16x = 92,119.96 × 39,895.32
  4. Step 4: Simplify right side
    66,758.16x = 3,675,155,282.59
  5. Step 5: Solve for x
    x = 3,675,155,282.59/66,758.16
  6. Step 6: Final answer
    x = 55,051.78

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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.