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Finding the Fourth Proportional to 66,662.39, 91,999.80 and 37,990.82

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Solution

The fourth proportional to 66,662.39, 91,999.80 and 37,990.82 is: 52,430.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,662.39 : 91,999.80 = 37,990.82 : x
  2. Step 2: Convert to fraction form
    66,662.39/91,999.80 = 37,990.82/x
  3. Step 3: Cross multiply
    66,662.39x = 91,999.80 × 37,990.82
  4. Step 4: Simplify right side
    66,662.39x = 3,495,148,071.84
  5. Step 5: Solve for x
    x = 3,495,148,071.84/66,662.39
  6. Step 6: Final answer
    x = 52,430.58

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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.