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Finding the Fourth Proportional to 84,678.75, 127,018.19 and 21,503.61

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Solution

The fourth proportional to 84,678.75, 127,018.19 and 21,503.61 is: 32,255.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,678.75 : 127,018.19 = 21,503.61 : x
  2. Step 2: Convert to fraction form
    84,678.75/127,018.19 = 21,503.61/x
  3. Step 3: Cross multiply
    84,678.75x = 127,018.19 × 21,503.61
  4. Step 4: Simplify right side
    84,678.75x = 2,731,349,620.67
  5. Step 5: Solve for x
    x = 2,731,349,620.67/84,678.75
  6. Step 6: Final answer
    x = 32,255.43

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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.