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Finding the Fourth Proportional to 129,653.25, 178,921.49 and 70,037.25

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Solution

The fourth proportional to 129,653.25, 178,921.49 and 70,037.25 is: 96,651.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,653.25 : 178,921.49 = 70,037.25 : x
  2. Step 2: Convert to fraction form
    129,653.25/178,921.49 = 70,037.25/x
  3. Step 3: Cross multiply
    129,653.25x = 178,921.49 × 70,037.25
  4. Step 4: Simplify right side
    129,653.25x = 12,531,168,775.32
  5. Step 5: Solve for x
    x = 12,531,168,775.32/129,653.25
  6. Step 6: Final answer
    x = 96,651.41

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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.