Home / 129,680.28-178,958.76-70,064.28

Finding the Fourth Proportional to 129,680.28, 178,958.76 and 70,064.28

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Solution

The fourth proportional to 129,680.28, 178,958.76 and 70,064.28 is: 96,688.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,680.28 : 178,958.76 = 70,064.28 : x
  2. Step 2: Convert to fraction form
    129,680.28/178,958.76 = 70,064.28/x
  3. Step 3: Cross multiply
    129,680.28x = 178,958.76 × 70,064.28
  4. Step 4: Simplify right side
    129,680.28x = 12,538,616,669.09
  5. Step 5: Solve for x
    x = 12,538,616,669.09/129,680.28
  6. Step 6: Final answer
    x = 96,688.69

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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.