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Finding the Fourth Proportional to 44,085.02, 66,128.07 and 12,920.90

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Solution

The fourth proportional to 44,085.02, 66,128.07 and 12,920.90 is: 19,381.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    44,085.02 : 66,128.07 = 12,920.90 : x
  2. Step 2: Convert to fraction form
    44,085.02/66,128.07 = 12,920.90/x
  3. Step 3: Cross multiply
    44,085.02x = 66,128.07 × 12,920.90
  4. Step 4: Simplify right side
    44,085.02x = 854,434,179.66
  5. Step 5: Solve for x
    x = 854,434,179.66/44,085.02
  6. Step 6: Final answer
    x = 19,381.51

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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.