Home / 128,417.75-177,216.78-71,061.23

Finding the Fourth Proportional to 128,417.75, 177,216.78 and 71,061.23

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Solution

The fourth proportional to 128,417.75, 177,216.78 and 71,061.23 is: 98,064.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,417.75 : 177,216.78 = 71,061.23 : x
  2. Step 2: Convert to fraction form
    128,417.75/177,216.78 = 71,061.23/x
  3. Step 3: Cross multiply
    128,417.75x = 177,216.78 × 71,061.23
  4. Step 4: Simplify right side
    128,417.75x = 12,593,242,363.44
  5. Step 5: Solve for x
    x = 12,593,242,363.44/128,417.75
  6. Step 6: Final answer
    x = 98,064.66

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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.