Home / 129,527.72-178,757.40-72,170.81

Finding the Fourth Proportional to 129,527.72, 178,757.40 and 72,170.81

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Solution

The fourth proportional to 129,527.72, 178,757.40 and 72,170.81 is: 99,600.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,527.72 : 178,757.40 = 72,170.81 : x
  2. Step 2: Convert to fraction form
    129,527.72/178,757.40 = 72,170.81/x
  3. Step 3: Cross multiply
    129,527.72x = 178,757.40 × 72,170.81
  4. Step 4: Simplify right side
    129,527.72x = 12,901,066,351.49
  5. Step 5: Solve for x
    x = 12,901,066,351.49/129,527.72
  6. Step 6: Final answer
    x = 99,600.81

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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.