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Finding the Fourth Proportional to 153,307.56, 211,564.38 and 86,239.56

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Solution

The fourth proportional to 153,307.56, 211,564.38 and 86,239.56 is: 119,010.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    153,307.56 : 211,564.38 = 86,239.56 : x
  2. Step 2: Convert to fraction form
    153,307.56/211,564.38 = 86,239.56/x
  3. Step 3: Cross multiply
    153,307.56x = 211,564.38 × 86,239.56
  4. Step 4: Simplify right side
    153,307.56x = 18,245,219,042.87
  5. Step 5: Solve for x
    x = 18,245,219,042.87/153,307.56
  6. Step 6: Final answer
    x = 119,010.56

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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.