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Finding the Fourth Proportional to 129,453.30, 178,629.03 and 72,853.74

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Solution

The fourth proportional to 129,453.30, 178,629.03 and 72,853.74 is: 100,528.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,453.30 : 178,629.03 = 72,853.74 : x
  2. Step 2: Convert to fraction form
    129,453.30/178,629.03 = 72,853.74/x
  3. Step 3: Cross multiply
    129,453.30x = 178,629.03 × 72,853.74
  4. Step 4: Simplify right side
    129,453.30x = 13,013,792,908.07
  5. Step 5: Solve for x
    x = 13,013,792,908.07/129,453.30
  6. Step 6: Final answer
    x = 100,528.86

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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.