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Finding the Fourth Proportional to 70,451.40, 97,223.78 and 38,619.60

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Solution

The fourth proportional to 70,451.40, 97,223.78 and 38,619.60 is: 53,295.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,451.40 : 97,223.78 = 38,619.60 : x
  2. Step 2: Convert to fraction form
    70,451.40/97,223.78 = 38,619.60/x
  3. Step 3: Cross multiply
    70,451.40x = 97,223.78 × 38,619.60
  4. Step 4: Simplify right side
    70,451.40x = 3,754,743,494.09
  5. Step 5: Solve for x
    x = 3,754,743,494.09/70,451.40
  6. Step 6: Final answer
    x = 53,295.51

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.