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Finding the Fourth Proportional to 90,840.50, 125,359.90 and 51,096.50

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Solution

The fourth proportional to 90,840.50, 125,359.90 and 51,096.50 is: 70,513.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,840.50 : 125,359.90 = 51,096.50 : x
  2. Step 2: Convert to fraction form
    90,840.50/125,359.90 = 51,096.50/x
  3. Step 3: Cross multiply
    90,840.50x = 125,359.90 × 51,096.50
  4. Step 4: Simplify right side
    90,840.50x = 6,405,452,130.35
  5. Step 5: Solve for x
    x = 6,405,452,130.35/90,840.50
  6. Step 6: Final answer
    x = 70,513.18

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.