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Finding the Fourth Proportional to 120,666.34, 166,518.48 and 69,689.80

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Solution

The fourth proportional to 120,666.34, 166,518.48 and 69,689.80 is: 96,171.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,666.34 : 166,518.48 = 69,689.80 : x
  2. Step 2: Convert to fraction form
    120,666.34/166,518.48 = 69,689.80/x
  3. Step 3: Cross multiply
    120,666.34x = 166,518.48 × 69,689.80
  4. Step 4: Simplify right side
    120,666.34x = 11,604,639,567.50
  5. Step 5: Solve for x
    x = 11,604,639,567.50/120,666.34
  6. Step 6: Final answer
    x = 96,171.31

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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.