Home / 129,440.27-178,611.84-72,065.22

Finding the Fourth Proportional to 129,440.27, 178,611.84 and 72,065.22

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Solution

The fourth proportional to 129,440.27, 178,611.84 and 72,065.22 is: 99,441.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,440.27 : 178,611.84 = 72,065.22 : x
  2. Step 2: Convert to fraction form
    129,440.27/178,611.84 = 72,065.22/x
  3. Step 3: Cross multiply
    129,440.27x = 178,611.84 × 72,065.22
  4. Step 4: Simplify right side
    129,440.27x = 12,871,701,544.20
  5. Step 5: Solve for x
    x = 12,871,701,544.20/129,440.27
  6. Step 6: Final answer
    x = 99,441.25

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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.