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Finding the Fourth Proportional to 70,661.06, 105,991.34 and 67,113.46

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Solution

The fourth proportional to 70,661.06, 105,991.34 and 67,113.46 is: 100,669.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,661.06 : 105,991.34 = 67,113.46 : x
  2. Step 2: Convert to fraction form
    70,661.06/105,991.34 = 67,113.46/x
  3. Step 3: Cross multiply
    70,661.06x = 105,991.34 × 67,113.46
  4. Step 4: Simplify right side
    70,661.06x = 7,113,445,354.36
  5. Step 5: Solve for x
    x = 7,113,445,354.36/70,661.06
  6. Step 6: Final answer
    x = 100,669.95

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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.