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Finding the Fourth Proportional to 104,047.30, 155,840.55 and 85,615.30

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Solution

The fourth proportional to 104,047.30, 155,840.55 and 85,615.30 is: 128,233.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    104,047.30 : 155,840.55 = 85,615.30 : x
  2. Step 2: Convert to fraction form
    104,047.30/155,840.55 = 85,615.30/x
  3. Step 3: Cross multiply
    104,047.30x = 155,840.55 × 85,615.30
  4. Step 4: Simplify right side
    104,047.30x = 13,342,335,440.42
  5. Step 5: Solve for x
    x = 13,342,335,440.42/104,047.30
  6. Step 6: Final answer
    x = 128,233.37

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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.