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Finding the Fourth Proportional to 70,172.80, 105,259.20 and 68,228.80

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Solution

The fourth proportional to 70,172.80, 105,259.20 and 68,228.80 is: 102,343.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,172.80 : 105,259.20 = 68,228.80 : x
  2. Step 2: Convert to fraction form
    70,172.80/105,259.20 = 68,228.80/x
  3. Step 3: Cross multiply
    70,172.80x = 105,259.20 × 68,228.80
  4. Step 4: Simplify right side
    70,172.80x = 7,181,708,904.96
  5. Step 5: Solve for x
    x = 7,181,708,904.96/70,172.80
  6. Step 6: Final answer
    x = 102,343.20

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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.