Home / 128,415.16-177,216.42-71,057.44

Finding the Fourth Proportional to 128,415.16, 177,216.42 and 71,057.44

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Solution

The fourth proportional to 128,415.16, 177,216.42 and 71,057.44 is: 98,061.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,415.16 : 177,216.42 = 71,057.44 : x
  2. Step 2: Convert to fraction form
    128,415.16/177,216.42 = 71,057.44/x
  3. Step 3: Cross multiply
    128,415.16x = 177,216.42 × 71,057.44
  4. Step 4: Simplify right side
    128,415.16x = 12,592,545,131.16
  5. Step 5: Solve for x
    x = 12,592,545,131.16/128,415.16
  6. Step 6: Final answer
    x = 98,061.20

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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.