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Finding the Fourth Proportional to 153,333, 211,599.54 and 86,265

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Solution

The fourth proportional to 153,333, 211,599.54 and 86,265 is: 119,045.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    153,333 : 211,599.54 = 86,265 : x
  2. Step 2: Convert to fraction form
    153,333/211,599.54 = 86,265/x
  3. Step 3: Cross multiply
    153,333x = 211,599.54 × 86,265
  4. Step 4: Simplify right side
    153,333x = 18,253,634,318.10
  5. Step 5: Solve for x
    x = 18,253,634,318.10/153,333
  6. Step 6: Final answer
    x = 119,045.70

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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.