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Finding the Fourth Proportional to 65,215.94, 89,976.42 and 45,065.57

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Solution

The fourth proportional to 65,215.94, 89,976.42 and 45,065.57 is: 62,175.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,215.94 : 89,976.42 = 45,065.57 : x
  2. Step 2: Convert to fraction form
    65,215.94/89,976.42 = 45,065.57/x
  3. Step 3: Cross multiply
    65,215.94x = 89,976.42 × 45,065.57
  4. Step 4: Simplify right side
    65,215.94x = 4,054,838,203.98
  5. Step 5: Solve for x
    x = 4,054,838,203.98/65,215.94
  6. Step 6: Final answer
    x = 62,175.57

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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.