Home / 81,280.36-121,909.02-27,971.56

Finding the Fourth Proportional to 81,280.36, 121,909.02 and 27,971.56

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Solution

The fourth proportional to 81,280.36, 121,909.02 and 27,971.56 is: 41,953.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,280.36 : 121,909.02 = 27,971.56 : x
  2. Step 2: Convert to fraction form
    81,280.36/121,909.02 = 27,971.56/x
  3. Step 3: Cross multiply
    81,280.36x = 121,909.02 × 27,971.56
  4. Step 4: Simplify right side
    81,280.36x = 3,409,985,467.47
  5. Step 5: Solve for x
    x = 3,409,985,467.47/81,280.36
  6. Step 6: Final answer
    x = 41,953.38

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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.