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Finding the Fourth Proportional to 89,702.92, 122,893.58 and 86,339.80

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Solution

The fourth proportional to 89,702.92, 122,893.58 and 86,339.80 is: 118,286.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    89,702.92 : 122,893.58 = 86,339.80 : x
  2. Step 2: Convert to fraction form
    89,702.92/122,893.58 = 86,339.80/x
  3. Step 3: Cross multiply
    89,702.92x = 122,893.58 × 86,339.80
  4. Step 4: Simplify right side
    89,702.92x = 10,610,607,118.48
  5. Step 5: Solve for x
    x = 10,610,607,118.48/89,702.92
  6. Step 6: Final answer
    x = 118,286.08

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.