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Finding the Fourth Proportional to 89,728.40, 134,592.60 and 68,733.20

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Solution

The fourth proportional to 89,728.40, 134,592.60 and 68,733.20 is: 103,099.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    89,728.40 : 134,592.60 = 68,733.20 : x
  2. Step 2: Convert to fraction form
    89,728.40/134,592.60 = 68,733.20/x
  3. Step 3: Cross multiply
    89,728.40x = 134,592.60 × 68,733.20
  4. Step 4: Simplify right side
    89,728.40x = 9,250,980,094.32
  5. Step 5: Solve for x
    x = 9,250,980,094.32/89,728.40
  6. Step 6: Final answer
    x = 103,099.80

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1.5x scale

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.