Home / 128,934.86-177,927.30-71,570.86

Finding the Fourth Proportional to 128,934.86, 177,927.30 and 71,570.86

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Solution

The fourth proportional to 128,934.86, 177,927.30 and 71,570.86 is: 98,766.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,934.86 : 177,927.30 = 71,570.86 : x
  2. Step 2: Convert to fraction form
    128,934.86/177,927.30 = 71,570.86/x
  3. Step 3: Cross multiply
    128,934.86x = 177,927.30 × 71,570.86
  4. Step 4: Simplify right side
    128,934.86x = 12,734,409,878.48
  5. Step 5: Solve for x
    x = 12,734,409,878.48/128,934.86
  6. Step 6: Final answer
    x = 98,766.23

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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.