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Finding the Fourth Proportional to 445,511.20, 668,419.80 and 130,014.40

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Solution

The fourth proportional to 445,511.20, 668,419.80 and 130,014.40 is: 195,066.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    445,511.20 : 668,419.80 = 130,014.40 : x
  2. Step 2: Convert to fraction form
    445,511.20/668,419.80 = 130,014.40/x
  3. Step 3: Cross multiply
    445,511.20x = 668,419.80 × 130,014.40
  4. Step 4: Simplify right side
    445,511.20x = 86,904,199,245.12
  5. Step 5: Solve for x
    x = 86,904,199,245.12/445,511.20
  6. Step 6: Final answer
    x = 195,066.25

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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.