Home / 128,589.96-177,461.46-72,000.84

Finding the Fourth Proportional to 128,589.96, 177,461.46 and 72,000.84

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Solution

The fourth proportional to 128,589.96, 177,461.46 and 72,000.84 is: 99,365.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,589.96 : 177,461.46 = 72,000.84 : x
  2. Step 2: Convert to fraction form
    128,589.96/177,461.46 = 72,000.84/x
  3. Step 3: Cross multiply
    128,589.96x = 177,461.46 × 72,000.84
  4. Step 4: Simplify right side
    128,589.96x = 12,777,374,187.63
  5. Step 5: Solve for x
    x = 12,777,374,187.63/128,589.96
  6. Step 6: Final answer
    x = 99,365.26

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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.