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Finding the Fourth Proportional to 66,465, 91,619.46 and 43,764.84

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Solution

The fourth proportional to 66,465, 91,619.46 and 43,764.84 is: 60,328.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,465 : 91,619.46 = 43,764.84 : x
  2. Step 2: Convert to fraction form
    66,465/91,619.46 = 43,764.84/x
  3. Step 3: Cross multiply
    66,465x = 91,619.46 × 43,764.84
  4. Step 4: Simplify right side
    66,465x = 4,009,711,007.79
  5. Step 5: Solve for x
    x = 4,009,711,007.79/66,465
  6. Step 6: Final answer
    x = 60,328.16

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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.