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Finding the Fourth Proportional to 66,485.13, 91,742.40 and 37,412.99

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Solution

The fourth proportional to 66,485.13, 91,742.40 and 37,412.99 is: 51,625.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,485.13 : 91,742.40 = 37,412.99 : x
  2. Step 2: Convert to fraction form
    66,485.13/91,742.40 = 37,412.99/x
  3. Step 3: Cross multiply
    66,485.13x = 91,742.40 × 37,412.99
  4. Step 4: Simplify right side
    66,485.13x = 3,432,357,035.06
  5. Step 5: Solve for x
    x = 3,432,357,035.06/66,485.13
  6. Step 6: Final answer
    x = 51,625.94

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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.