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Finding the Fourth Proportional to 216,038.40, 323,620.20 and 122,434.80

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Solution

The fourth proportional to 216,038.40, 323,620.20 and 122,434.80 is: 183,404.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    216,038.40 : 323,620.20 = 122,434.80 : x
  2. Step 2: Convert to fraction form
    216,038.40/323,620.20 = 122,434.80/x
  3. Step 3: Cross multiply
    216,038.40x = 323,620.20 × 122,434.80
  4. Step 4: Simplify right side
    216,038.40x = 39,622,374,462.96
  5. Step 5: Solve for x
    x = 39,622,374,462.96/216,038.40
  6. Step 6: Final answer
    x = 183,404.31

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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.