Home / 128,445.49-177,250.77-71,081.36

Finding the Fourth Proportional to 128,445.49, 177,250.77 and 71,081.36

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Solution

The fourth proportional to 128,445.49, 177,250.77 and 71,081.36 is: 98,090.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,445.49 : 177,250.77 = 71,081.36 : x
  2. Step 2: Convert to fraction form
    128,445.49/177,250.77 = 71,081.36/x
  3. Step 3: Cross multiply
    128,445.49x = 177,250.77 × 71,081.36
  4. Step 4: Simplify right side
    128,445.49x = 12,599,224,906.39
  5. Step 5: Solve for x
    x = 12,599,224,906.39/128,445.49
  6. Step 6: Final answer
    x = 98,090.05

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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.