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Finding the Fourth Proportional to 129,661.58, 178,933.02 and 70,045.58

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Solution

The fourth proportional to 129,661.58, 178,933.02 and 70,045.58 is: 96,662.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,661.58 : 178,933.02 = 70,045.58 : x
  2. Step 2: Convert to fraction form
    129,661.58/178,933.02 = 70,045.58/x
  3. Step 3: Cross multiply
    129,661.58x = 178,933.02 × 70,045.58
  4. Step 4: Simplify right side
    129,661.58x = 12,533,467,167.05
  5. Step 5: Solve for x
    x = 12,533,467,167.05/129,661.58
  6. Step 6: Final answer
    x = 96,662.92

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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.