Home / 128,918.82-177,904.55-71,557.98

Finding the Fourth Proportional to 128,918.82, 177,904.55 and 71,557.98

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Solution

The fourth proportional to 128,918.82, 177,904.55 and 71,557.98 is: 98,748.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,918.82 : 177,904.55 = 71,557.98 : x
  2. Step 2: Convert to fraction form
    128,918.82/177,904.55 = 71,557.98/x
  3. Step 3: Cross multiply
    128,918.82x = 177,904.55 × 71,557.98
  4. Step 4: Simplify right side
    128,918.82x = 12,730,489,742.56
  5. Step 5: Solve for x
    x = 12,730,489,742.56/128,918.82
  6. Step 6: Final answer
    x = 98,748.11

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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.