Home / 121,665.55-166,679-117,117.05

Finding the Fourth Proportional to 121,665.55, 166,679 and 117,117.05

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Solution

The fourth proportional to 121,665.55, 166,679 and 117,117.05 is: 160,447.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,665.55 : 166,679 = 117,117.05 : x
  2. Step 2: Convert to fraction form
    121,665.55/166,679 = 117,117.05/x
  3. Step 3: Cross multiply
    121,665.55x = 166,679 × 117,117.05
  4. Step 4: Simplify right side
    121,665.55x = 19,520,952,776.95
  5. Step 5: Solve for x
    x = 19,520,952,776.95/121,665.55
  6. Step 6: Final answer
    x = 160,447.66

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.