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Finding the Fourth Proportional to 120,602, 166,430.80 and 66,895.28

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Solution

The fourth proportional to 120,602, 166,430.80 and 66,895.28 is: 92,315.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,602 : 166,430.80 = 66,895.28 : x
  2. Step 2: Convert to fraction form
    120,602/166,430.80 = 66,895.28/x
  3. Step 3: Cross multiply
    120,602x = 166,430.80 × 66,895.28
  4. Step 4: Simplify right side
    120,602x = 11,133,434,966.62
  5. Step 5: Solve for x
    x = 11,133,434,966.62/120,602
  6. Step 6: Final answer
    x = 92,315.51

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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.