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Finding the Fourth Proportional to 100,970.40, 151,455.60 and 30,840.60

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Solution

The fourth proportional to 100,970.40, 151,455.60 and 30,840.60 is: 46,260.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,970.40 : 151,455.60 = 30,840.60 : x
  2. Step 2: Convert to fraction form
    100,970.40/151,455.60 = 30,840.60/x
  3. Step 3: Cross multiply
    100,970.40x = 151,455.60 × 30,840.60
  4. Step 4: Simplify right side
    100,970.40x = 4,670,981,577.36
  5. Step 5: Solve for x
    x = 4,670,981,577.36/100,970.40
  6. Step 6: Final answer
    x = 46,260.90

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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.