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Finding the Fourth Proportional to 72,612.02, 108,915.06 and 20,020.07

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Solution

The fourth proportional to 72,612.02, 108,915.06 and 20,020.07 is: 30,029.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,612.02 : 108,915.06 = 20,020.07 : x
  2. Step 2: Convert to fraction form
    72,612.02/108,915.06 = 20,020.07/x
  3. Step 3: Cross multiply
    72,612.02x = 108,915.06 × 20,020.07
  4. Step 4: Simplify right side
    72,612.02x = 2,180,487,125.25
  5. Step 5: Solve for x
    x = 2,180,487,125.25/72,612.02
  6. Step 6: Final answer
    x = 30,029.29

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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.