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Finding the Fourth Proportional to 121,656.50, 166,666.63 and 117,108.01

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Solution

The fourth proportional to 121,656.50, 166,666.63 and 117,108.01 is: 160,435.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,656.50 : 166,666.63 = 117,108.01 : x
  2. Step 2: Convert to fraction form
    121,656.50/166,666.63 = 117,108.01/x
  3. Step 3: Cross multiply
    121,656.50x = 166,666.63 × 117,108.01
  4. Step 4: Simplify right side
    121,656.50x = 19,517,997,195.35
  5. Step 5: Solve for x
    x = 19,517,997,195.35/121,656.50
  6. Step 6: Final answer
    x = 160,435.30

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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.