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Finding the Fourth Proportional to 85,941.20, 128,911.80 and 49,077.20

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Solution

The fourth proportional to 85,941.20, 128,911.80 and 49,077.20 is: 73,615.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,941.20 : 128,911.80 = 49,077.20 : x
  2. Step 2: Convert to fraction form
    85,941.20/128,911.80 = 49,077.20/x
  3. Step 3: Cross multiply
    85,941.20x = 128,911.80 × 49,077.20
  4. Step 4: Simplify right side
    85,941.20x = 6,326,630,190.96
  5. Step 5: Solve for x
    x = 6,326,630,190.96/85,941.20
  6. Step 6: Final answer
    x = 73,615.80

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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.