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Finding the Fourth Proportional to 110,987, 153,162.64 and 60,686

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Solution

The fourth proportional to 110,987, 153,162.64 and 60,686 is: 83,747.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    110,987 : 153,162.64 = 60,686 : x
  2. Step 2: Convert to fraction form
    110,987/153,162.64 = 60,686/x
  3. Step 3: Cross multiply
    110,987x = 153,162.64 × 60,686
  4. Step 4: Simplify right side
    110,987x = 9,294,827,971.04
  5. Step 5: Solve for x
    x = 9,294,827,971.04/110,987
  6. Step 6: Final answer
    x = 83,747.00

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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.