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Finding the Fourth Proportional to 120,779.86, 166,681.34 and 67,064.84

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Solution

The fourth proportional to 120,779.86, 166,681.34 and 67,064.84 is: 92,552.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,779.86 : 166,681.34 = 67,064.84 : x
  2. Step 2: Convert to fraction form
    120,779.86/166,681.34 = 67,064.84/x
  3. Step 3: Cross multiply
    120,779.86x = 166,681.34 × 67,064.84
  4. Step 4: Simplify right side
    120,779.86x = 11,178,457,014.35
  5. Step 5: Solve for x
    x = 11,178,457,014.35/120,779.86
  6. Step 6: Final answer
    x = 92,552.33

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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.