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Finding the Fourth Proportional to 120,810.45, 166,875.42 and 91,954.89

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Solution

The fourth proportional to 120,810.45, 166,875.42 and 91,954.89 is: 127,017.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,810.45 : 166,875.42 = 91,954.89 : x
  2. Step 2: Convert to fraction form
    120,810.45/166,875.42 = 91,954.89/x
  3. Step 3: Cross multiply
    120,810.45x = 166,875.42 × 91,954.89
  4. Step 4: Simplify right side
    120,810.45x = 15,345,010,889.80
  5. Step 5: Solve for x
    x = 15,345,010,889.80/120,810.45
  6. Step 6: Final answer
    x = 127,017.25

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1.5x scale

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.