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Finding the Fourth Proportional to 120,580.65, 166,401.74 and 66,870.63

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Solution

The fourth proportional to 120,580.65, 166,401.74 and 66,870.63 is: 92,281.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,580.65 : 166,401.74 = 66,870.63 : x
  2. Step 2: Convert to fraction form
    120,580.65/166,401.74 = 66,870.63/x
  3. Step 3: Cross multiply
    120,580.65x = 166,401.74 × 66,870.63
  4. Step 4: Simplify right side
    120,580.65x = 11,127,389,354.07
  5. Step 5: Solve for x
    x = 11,127,389,354.07/120,580.65
  6. Step 6: Final answer
    x = 92,281.72

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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.