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Finding the Fourth Proportional to 66,473.68, 91,641.80 and 53,090

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Solution

The fourth proportional to 66,473.68, 91,641.80 and 53,090 is: 73,190.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,473.68 : 91,641.80 = 53,090 : x
  2. Step 2: Convert to fraction form
    66,473.68/91,641.80 = 53,090/x
  3. Step 3: Cross multiply
    66,473.68x = 91,641.80 × 53,090
  4. Step 4: Simplify right side
    66,473.68x = 4,865,263,162
  5. Step 5: Solve for x
    x = 4,865,263,162/66,473.68
  6. Step 6: Final answer
    x = 73,190.82

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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.