Home / 128,331.48-177,098.04-71,741.64

Finding the Fourth Proportional to 128,331.48, 177,098.04 and 71,741.64

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Solution

The fourth proportional to 128,331.48, 177,098.04 and 71,741.64 is: 99,003.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,331.48 : 177,098.04 = 71,741.64 : x
  2. Step 2: Convert to fraction form
    128,331.48/177,098.04 = 71,741.64/x
  3. Step 3: Cross multiply
    128,331.48x = 177,098.04 × 71,741.64
  4. Step 4: Simplify right side
    128,331.48x = 12,705,303,830.39
  5. Step 5: Solve for x
    x = 12,705,303,830.39/128,331.48
  6. Step 6: Final answer
    x = 99,003.80

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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.