Home / 129,300.79-178,431.69-71,940.23

Finding the Fourth Proportional to 129,300.79, 178,431.69 and 71,940.23

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Solution

The fourth proportional to 129,300.79, 178,431.69 and 71,940.23 is: 99,275.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,300.79 : 178,431.69 = 71,940.23 : x
  2. Step 2: Convert to fraction form
    129,300.79/178,431.69 = 71,940.23/x
  3. Step 3: Cross multiply
    129,300.79x = 178,431.69 × 71,940.23
  4. Step 4: Simplify right side
    129,300.79x = 12,836,416,211.04
  5. Step 5: Solve for x
    x = 12,836,416,211.04/129,300.79
  6. Step 6: Final answer
    x = 99,275.62

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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.