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Finding the Fourth Proportional to 120,971.01, 166,940.66 and 66,526.70

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Solution

The fourth proportional to 120,971.01, 166,940.66 and 66,526.70 is: 91,807.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,971.01 : 166,940.66 = 66,526.70 : x
  2. Step 2: Convert to fraction form
    120,971.01/166,940.66 = 66,526.70/x
  3. Step 3: Cross multiply
    120,971.01x = 166,940.66 × 66,526.70
  4. Step 4: Simplify right side
    120,971.01x = 11,106,010,038.29
  5. Step 5: Solve for x
    x = 11,106,010,038.29/120,971.01
  6. Step 6: Final answer
    x = 91,807.20

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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.