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Finding the Fourth Proportional to 70,986.87, 97,960.37 and 39,158.73

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Solution

The fourth proportional to 70,986.87, 97,960.37 and 39,158.73 is: 54,038.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,986.87 : 97,960.37 = 39,158.73 : x
  2. Step 2: Convert to fraction form
    70,986.87/97,960.37 = 39,158.73/x
  3. Step 3: Cross multiply
    70,986.87x = 97,960.37 × 39,158.73
  4. Step 4: Simplify right side
    70,986.87x = 3,836,003,483.74
  5. Step 5: Solve for x
    x = 3,836,003,483.74/70,986.87
  6. Step 6: Final answer
    x = 54,038.21

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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.