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Finding the Fourth Proportional to 66,617.04, 91,888.52 and 39,738.80

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Solution

The fourth proportional to 66,617.04, 91,888.52 and 39,738.80 is: 54,813.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,617.04 : 91,888.52 = 39,738.80 : x
  2. Step 2: Convert to fraction form
    66,617.04/91,888.52 = 39,738.80/x
  3. Step 3: Cross multiply
    66,617.04x = 91,888.52 × 39,738.80
  4. Step 4: Simplify right side
    66,617.04x = 3,651,539,518.58
  5. Step 5: Solve for x
    x = 3,651,539,518.58/66,617.04
  6. Step 6: Final answer
    x = 54,813.90

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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.