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Finding the Fourth Proportional to 70,970.54, 97,939.96 and 39,140.54

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Solution

The fourth proportional to 70,970.54, 97,939.96 and 39,140.54 is: 54,014.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,970.54 : 97,939.96 = 39,140.54 : x
  2. Step 2: Convert to fraction form
    70,970.54/97,939.96 = 39,140.54/x
  3. Step 3: Cross multiply
    70,970.54x = 97,939.96 × 39,140.54
  4. Step 4: Simplify right side
    70,970.54x = 3,833,422,334.43
  5. Step 5: Solve for x
    x = 3,833,422,334.43/70,970.54
  6. Step 6: Final answer
    x = 54,014.28

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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.