Home / 128,372.01-177,139.75-71,002.22

Finding the Fourth Proportional to 128,372.01, 177,139.75 and 71,002.22

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Solution

The fourth proportional to 128,372.01, 177,139.75 and 71,002.22 is: 97,975.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,372.01 : 177,139.75 = 71,002.22 : x
  2. Step 2: Convert to fraction form
    128,372.01/177,139.75 = 71,002.22/x
  3. Step 3: Cross multiply
    128,372.01x = 177,139.75 × 71,002.22
  4. Step 4: Simplify right side
    128,372.01x = 12,577,315,500.25
  5. Step 5: Solve for x
    x = 12,577,315,500.25/128,372.01
  6. Step 6: Final answer
    x = 97,975.53

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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.