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Finding the Fourth Proportional to 70,013.20, 105,019.80 and 43,747.60

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Solution

The fourth proportional to 70,013.20, 105,019.80 and 43,747.60 is: 65,621.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,013.20 : 105,019.80 = 43,747.60 : x
  2. Step 2: Convert to fraction form
    70,013.20/105,019.80 = 43,747.60/x
  3. Step 3: Cross multiply
    70,013.20x = 105,019.80 × 43,747.60
  4. Step 4: Simplify right side
    70,013.20x = 4,594,364,202.48
  5. Step 5: Solve for x
    x = 4,594,364,202.48/70,013.20
  6. Step 6: Final answer
    x = 65,621.40

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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.