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Finding the Fourth Proportional to 117,215.55, 161,747.82 and 66,232.71

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Solution

The fourth proportional to 117,215.55, 161,747.82 and 66,232.71 is: 91,395.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    117,215.55 : 161,747.82 = 66,232.71 : x
  2. Step 2: Convert to fraction form
    117,215.55/161,747.82 = 66,232.71/x
  3. Step 3: Cross multiply
    117,215.55x = 161,747.82 × 66,232.71
  4. Step 4: Simplify right side
    117,215.55x = 10,712,996,455.19
  5. Step 5: Solve for x
    x = 10,712,996,455.19/117,215.55
  6. Step 6: Final answer
    x = 91,395.69

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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.