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Finding the Fourth Proportional to 116,758.50, 161,126.91 and 66,457.50

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Solution

The fourth proportional to 116,758.50, 161,126.91 and 66,457.50 is: 91,711.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    116,758.50 : 161,126.91 = 66,457.50 : x
  2. Step 2: Convert to fraction form
    116,758.50/161,126.91 = 66,457.50/x
  3. Step 3: Cross multiply
    116,758.50x = 161,126.91 × 66,457.50
  4. Step 4: Simplify right side
    116,758.50x = 10,708,091,621.33
  5. Step 5: Solve for x
    x = 10,708,091,621.33/116,758.50
  6. Step 6: Final answer
    x = 91,711.45

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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.