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Finding the Fourth Proportional to 70,291.35, 105,437.07 and 28,738.35

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Solution

The fourth proportional to 70,291.35, 105,437.07 and 28,738.35 is: 43,107.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,291.35 : 105,437.07 = 28,738.35 : x
  2. Step 2: Convert to fraction form
    70,291.35/105,437.07 = 28,738.35/x
  3. Step 3: Cross multiply
    70,291.35x = 105,437.07 × 28,738.35
  4. Step 4: Simplify right side
    70,291.35x = 3,030,087,420.63
  5. Step 5: Solve for x
    x = 3,030,087,420.63/70,291.35
  6. Step 6: Final answer
    x = 43,107.54

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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.