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Finding the Fourth Proportional to 102,704.60, 154,056.90 and 87,152.60

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Solution

The fourth proportional to 102,704.60, 154,056.90 and 87,152.60 is: 130,728.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    102,704.60 : 154,056.90 = 87,152.60 : x
  2. Step 2: Convert to fraction form
    102,704.60/154,056.90 = 87,152.60/x
  3. Step 3: Cross multiply
    102,704.60x = 154,056.90 × 87,152.60
  4. Step 4: Simplify right side
    102,704.60x = 13,426,459,382.94
  5. Step 5: Solve for x
    x = 13,426,459,382.94/102,704.60
  6. Step 6: Final answer
    x = 130,728.90

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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.