Home / 129,522.78-178,729.21-72,156.25

Finding the Fourth Proportional to 129,522.78, 178,729.21 and 72,156.25

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Solution

The fourth proportional to 129,522.78, 178,729.21 and 72,156.25 is: 99,568.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,522.78 : 178,729.21 = 72,156.25 : x
  2. Step 2: Convert to fraction form
    129,522.78/178,729.21 = 72,156.25/x
  3. Step 3: Cross multiply
    129,522.78x = 178,729.21 × 72,156.25
  4. Step 4: Simplify right side
    129,522.78x = 12,896,429,559.06
  5. Step 5: Solve for x
    x = 12,896,429,559.06/129,522.78
  6. Step 6: Final answer
    x = 99,568.81

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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.