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Finding the Fourth Proportional to 120,658.55, 166,505.63 and 66,210.55

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Solution

The fourth proportional to 120,658.55, 166,505.63 and 66,210.55 is: 91,368.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,658.55 : 166,505.63 = 66,210.55 : x
  2. Step 2: Convert to fraction form
    120,658.55/166,505.63 = 66,210.55/x
  3. Step 3: Cross multiply
    120,658.55x = 166,505.63 × 66,210.55
  4. Step 4: Simplify right side
    120,658.55x = 11,024,428,593.08
  5. Step 5: Solve for x
    x = 11,024,428,593.08/120,658.55
  6. Step 6: Final answer
    x = 91,368.82

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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.