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Finding the Fourth Proportional to 145,203.40, 217,545.90 and 122,912.20

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Solution

The fourth proportional to 145,203.40, 217,545.90 and 122,912.20 is: 184,148.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    145,203.40 : 217,545.90 = 122,912.20 : x
  2. Step 2: Convert to fraction form
    145,203.40/217,545.90 = 122,912.20/x
  3. Step 3: Cross multiply
    145,203.40x = 217,545.90 × 122,912.20
  4. Step 4: Simplify right side
    145,203.40x = 26,739,045,169.98
  5. Step 5: Solve for x
    x = 26,739,045,169.98/145,203.40
  6. Step 6: Final answer
    x = 184,148.89

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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.