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Finding the Fourth Proportional to 70,303.20, 105,454.80 and 28,740.48

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Solution

The fourth proportional to 70,303.20, 105,454.80 and 28,740.48 is: 43,110.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,303.20 : 105,454.80 = 28,740.48 : x
  2. Step 2: Convert to fraction form
    70,303.20/105,454.80 = 28,740.48/x
  3. Step 3: Cross multiply
    70,303.20x = 105,454.80 × 28,740.48
  4. Step 4: Simplify right side
    70,303.20x = 3,030,821,570.30
  5. Step 5: Solve for x
    x = 3,030,821,570.30/70,303.20
  6. Step 6: Final answer
    x = 43,110.72

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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.