Home / 128,328.06-177,096.75-71,739.18

Finding the Fourth Proportional to 128,328.06, 177,096.75 and 71,739.18

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Solution

The fourth proportional to 128,328.06, 177,096.75 and 71,739.18 is: 99,002.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,328.06 : 177,096.75 = 71,739.18 : x
  2. Step 2: Convert to fraction form
    128,328.06/177,096.75 = 71,739.18/x
  3. Step 3: Cross multiply
    128,328.06x = 177,096.75 × 71,739.18
  4. Step 4: Simplify right side
    128,328.06x = 12,704,775,625.67
  5. Step 5: Solve for x
    x = 12,704,775,625.67/128,328.06
  6. Step 6: Final answer
    x = 99,002.32

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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.