Home / 81,006.15-121,345.20-45,904.80

Finding the Fourth Proportional to 81,006.15, 121,345.20 and 45,904.80

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Solution

The fourth proportional to 81,006.15, 121,345.20 and 45,904.80 is: 68,764.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,006.15 : 121,345.20 = 45,904.80 : x
  2. Step 2: Convert to fraction form
    81,006.15/121,345.20 = 45,904.80/x
  3. Step 3: Cross multiply
    81,006.15x = 121,345.20 × 45,904.80
  4. Step 4: Simplify right side
    81,006.15x = 5,570,327,136.96
  5. Step 5: Solve for x
    x = 5,570,327,136.96/81,006.15
  6. Step 6: Final answer
    x = 68,764.25

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.