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Finding the Fourth Proportional to 145,220.40, 217,787.40 and 56,422.80

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Solution

The fourth proportional to 145,220.40, 217,787.40 and 56,422.80 is: 84,617.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    145,220.40 : 217,787.40 = 56,422.80 : x
  2. Step 2: Convert to fraction form
    145,220.40/217,787.40 = 56,422.80/x
  3. Step 3: Cross multiply
    145,220.40x = 217,787.40 × 56,422.80
  4. Step 4: Simplify right side
    145,220.40x = 12,288,174,912.72
  5. Step 5: Solve for x
    x = 12,288,174,912.72/145,220.40
  6. Step 6: Final answer
    x = 84,617.42

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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.