Home / 120,615.69-166,459.86-66,918

Finding the Fourth Proportional to 120,615.69, 166,459.86 and 66,918

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Solution

The fourth proportional to 120,615.69, 166,459.86 and 66,918 is: 92,352.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,615.69 : 166,459.86 = 66,918 : x
  2. Step 2: Convert to fraction form
    120,615.69/166,459.86 = 66,918/x
  3. Step 3: Cross multiply
    120,615.69x = 166,459.86 × 66,918
  4. Step 4: Simplify right side
    120,615.69x = 11,139,160,911.48
  5. Step 5: Solve for x
    x = 11,139,160,911.48/120,615.69
  6. Step 6: Final answer
    x = 92,352.50

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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.