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Finding the Fourth Proportional to 116,866, 161,271.66 and 65,881.72

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Solution

The fourth proportional to 116,866, 161,271.66 and 65,881.72 is: 90,914.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    116,866 : 161,271.66 = 65,881.72 : x
  2. Step 2: Convert to fraction form
    116,866/161,271.66 = 65,881.72/x
  3. Step 3: Cross multiply
    116,866x = 161,271.66 × 65,881.72
  4. Step 4: Simplify right side
    116,866x = 10,624,854,348.06
  5. Step 5: Solve for x
    x = 10,624,854,348.06/116,866
  6. Step 6: Final answer
    x = 90,914.85

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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.