Home / 120,430.66-166,170.36-72,686.62

Finding the Fourth Proportional to 120,430.66, 166,170.36 and 72,686.62

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Solution

The fourth proportional to 120,430.66, 166,170.36 and 72,686.62 is: 100,293.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,430.66 : 166,170.36 = 72,686.62 : x
  2. Step 2: Convert to fraction form
    120,430.66/166,170.36 = 72,686.62/x
  3. Step 3: Cross multiply
    120,430.66x = 166,170.36 × 72,686.62
  4. Step 4: Simplify right side
    120,430.66x = 12,078,361,812.58
  5. Step 5: Solve for x
    x = 12,078,361,812.58/120,430.66
  6. Step 6: Final answer
    x = 100,293.08

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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.