Home / 128,849.04-177,811.34-72,261.63

Finding the Fourth Proportional to 128,849.04, 177,811.34 and 72,261.63

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Solution

The fourth proportional to 128,849.04, 177,811.34 and 72,261.63 is: 99,720.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,849.04 : 177,811.34 = 72,261.63 : x
  2. Step 2: Convert to fraction form
    128,849.04/177,811.34 = 72,261.63/x
  3. Step 3: Cross multiply
    128,849.04x = 177,811.34 × 72,261.63
  4. Step 4: Simplify right side
    128,849.04x = 12,848,936,899.58
  5. Step 5: Solve for x
    x = 12,848,936,899.58/128,849.04
  6. Step 6: Final answer
    x = 99,720.86

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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.