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Finding the Fourth Proportional to 70,341.50, 105,512.25 and 21,093.50

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Solution

The fourth proportional to 70,341.50, 105,512.25 and 21,093.50 is: 31,640.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,341.50 : 105,512.25 = 21,093.50 : x
  2. Step 2: Convert to fraction form
    70,341.50/105,512.25 = 21,093.50/x
  3. Step 3: Cross multiply
    70,341.50x = 105,512.25 × 21,093.50
  4. Step 4: Simplify right side
    70,341.50x = 2,225,622,645.38
  5. Step 5: Solve for x
    x = 2,225,622,645.38/70,341.50
  6. Step 6: Final answer
    x = 31,640.25

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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.