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Finding the Fourth Proportional to 147,720.40, 221,436.60 and 84,475.60

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Solution

The fourth proportional to 147,720.40, 221,436.60 and 84,475.60 is: 126,631.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    147,720.40 : 221,436.60 = 84,475.60 : x
  2. Step 2: Convert to fraction form
    147,720.40/221,436.60 = 84,475.60/x
  3. Step 3: Cross multiply
    147,720.40x = 221,436.60 × 84,475.60
  4. Step 4: Simplify right side
    147,720.40x = 18,705,989,646.96
  5. Step 5: Solve for x
    x = 18,705,989,646.96/147,720.40
  6. Step 6: Final answer
    x = 126,631.05

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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.