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Finding the Fourth Proportional to 70,152.14, 105,243.79 and 20,228.35

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Solution

The fourth proportional to 70,152.14, 105,243.79 and 20,228.35 is: 30,347.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,152.14 : 105,243.79 = 20,228.35 : x
  2. Step 2: Convert to fraction form
    70,152.14/105,243.79 = 20,228.35/x
  3. Step 3: Cross multiply
    70,152.14x = 105,243.79 × 20,228.35
  4. Step 4: Simplify right side
    70,152.14x = 2,128,908,219.45
  5. Step 5: Solve for x
    x = 2,128,908,219.45/70,152.14
  6. Step 6: Final answer
    x = 30,347.02

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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.