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Finding the Fourth Proportional to 70,206.66, 105,216.84 and 30,720.78

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Solution

The fourth proportional to 70,206.66, 105,216.84 and 30,720.78 is: 46,040.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,206.66 : 105,216.84 = 30,720.78 : x
  2. Step 2: Convert to fraction form
    70,206.66/105,216.84 = 30,720.78/x
  3. Step 3: Cross multiply
    70,206.66x = 105,216.84 × 30,720.78
  4. Step 4: Simplify right side
    70,206.66x = 3,232,343,393.94
  5. Step 5: Solve for x
    x = 3,232,343,393.94/70,206.66
  6. Step 6: Final answer
    x = 46,040.41

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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.