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Finding the Fourth Proportional to 66,461.99, 91,714.31 and 39,603.90

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Solution

The fourth proportional to 66,461.99, 91,714.31 and 39,603.90 is: 54,651.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,461.99 : 91,714.31 = 39,603.90 : x
  2. Step 2: Convert to fraction form
    66,461.99/91,714.31 = 39,603.90/x
  3. Step 3: Cross multiply
    66,461.99x = 91,714.31 × 39,603.90
  4. Step 4: Simplify right side
    66,461.99x = 3,632,244,361.81
  5. Step 5: Solve for x
    x = 3,632,244,361.81/66,461.99
  6. Step 6: Final answer
    x = 54,651.45

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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.