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Finding the Fourth Proportional to 245,720.40, 368,580.60 and 87,961.20

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Solution

The fourth proportional to 245,720.40, 368,580.60 and 87,961.20 is: 131,941.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    245,720.40 : 368,580.60 = 87,961.20 : x
  2. Step 2: Convert to fraction form
    245,720.40/368,580.60 = 87,961.20/x
  3. Step 3: Cross multiply
    245,720.40x = 368,580.60 × 87,961.20
  4. Step 4: Simplify right side
    245,720.40x = 32,420,791,872.72
  5. Step 5: Solve for x
    x = 32,420,791,872.72/245,720.40
  6. Step 6: Final answer
    x = 131,941.80

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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.