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Finding the Fourth Proportional to 156,745.40, 235,020.90 and 90,152.60

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Solution

The fourth proportional to 156,745.40, 235,020.90 and 90,152.60 is: 135,173.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    156,745.40 : 235,020.90 = 90,152.60 : x
  2. Step 2: Convert to fraction form
    156,745.40/235,020.90 = 90,152.60/x
  3. Step 3: Cross multiply
    156,745.40x = 235,020.90 × 90,152.60
  4. Step 4: Simplify right side
    156,745.40x = 21,187,745,189.34
  5. Step 5: Solve for x
    x = 21,187,745,189.34/156,745.40
  6. Step 6: Final answer
    x = 135,173.00

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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.