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Finding the Fourth Proportional to 100,840.60, 151,260.90 and 99,285.40

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Solution

The fourth proportional to 100,840.60, 151,260.90 and 99,285.40 is: 148,928.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,840.60 : 151,260.90 = 99,285.40 : x
  2. Step 2: Convert to fraction form
    100,840.60/151,260.90 = 99,285.40/x
  3. Step 3: Cross multiply
    100,840.60x = 151,260.90 × 99,285.40
  4. Step 4: Simplify right side
    100,840.60x = 15,017,998,960.86
  5. Step 5: Solve for x
    x = 15,017,998,960.86/100,840.60
  6. Step 6: Final answer
    x = 148,928.10

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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.