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Finding the Fourth Proportional to 65,878.07, 90,911.64 and 35,663.39

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Solution

The fourth proportional to 65,878.07, 90,911.64 and 35,663.39 is: 49,215.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,878.07 : 90,911.64 = 35,663.39 : x
  2. Step 2: Convert to fraction form
    65,878.07/90,911.64 = 35,663.39/x
  3. Step 3: Cross multiply
    65,878.07x = 90,911.64 × 35,663.39
  4. Step 4: Simplify right side
    65,878.07x = 3,242,216,639.98
  5. Step 5: Solve for x
    x = 3,242,216,639.98/65,878.07
  6. Step 6: Final answer
    x = 49,215.42

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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.