Home / 128,261.41-176,999.48-71,672.78

Finding the Fourth Proportional to 128,261.41, 176,999.48 and 71,672.78

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Solution

The fourth proportional to 128,261.41, 176,999.48 and 71,672.78 is: 98,907.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,261.41 : 176,999.48 = 71,672.78 : x
  2. Step 2: Convert to fraction form
    128,261.41/176,999.48 = 71,672.78/x
  3. Step 3: Cross multiply
    128,261.41x = 176,999.48 × 71,672.78
  4. Step 4: Simplify right side
    128,261.41x = 12,686,045,143.06
  5. Step 5: Solve for x
    x = 12,686,045,143.06/128,261.41
  6. Step 6: Final answer
    x = 98,907.73

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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.