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Finding the Fourth Proportional to 89,718.40, 134,462.40 and 68,838.40

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Solution

The fourth proportional to 89,718.40, 134,462.40 and 68,838.40 is: 103,169.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    89,718.40 : 134,462.40 = 68,838.40 : x
  2. Step 2: Convert to fraction form
    89,718.40/134,462.40 = 68,838.40/x
  3. Step 3: Cross multiply
    89,718.40x = 134,462.40 × 68,838.40
  4. Step 4: Simplify right side
    89,718.40x = 9,256,176,476.16
  5. Step 5: Solve for x
    x = 9,256,176,476.16/89,718.40
  6. Step 6: Final answer
    x = 103,169.21

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.