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Finding the Fourth Proportional to 281,001.60, 421,305.30 and 103,485.60

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Solution

The fourth proportional to 281,001.60, 421,305.30 and 103,485.60 is: 155,155.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    281,001.60 : 421,305.30 = 103,485.60 : x
  2. Step 2: Convert to fraction form
    281,001.60/421,305.30 = 103,485.60/x
  3. Step 3: Cross multiply
    281,001.60x = 421,305.30 × 103,485.60
  4. Step 4: Simplify right side
    281,001.60x = 43,599,031,753.68
  5. Step 5: Solve for x
    x = 43,599,031,753.68/281,001.60
  6. Step 6: Final answer
    x = 155,155.81

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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.