Home / 128,841.10-178,205.07-113,937.10

Finding the Fourth Proportional to 128,841.10, 178,205.07 and 113,937.10

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Solution

The fourth proportional to 128,841.10, 178,205.07 and 113,937.10 is: 157,590.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,841.10 : 178,205.07 = 113,937.10 : x
  2. Step 2: Convert to fraction form
    128,841.10/178,205.07 = 113,937.10/x
  3. Step 3: Cross multiply
    128,841.10x = 178,205.07 × 113,937.10
  4. Step 4: Simplify right side
    128,841.10x = 20,304,168,881.10
  5. Step 5: Solve for x
    x = 20,304,168,881.10/128,841.10
  6. Step 6: Final answer
    x = 157,590.78

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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.