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Finding the Fourth Proportional to 70,292.34, 105,438.58 and 28,739.34

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Solution

The fourth proportional to 70,292.34, 105,438.58 and 28,739.34 is: 43,109.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,292.34 : 105,438.58 = 28,739.34 : x
  2. Step 2: Convert to fraction form
    70,292.34/105,438.58 = 28,739.34/x
  3. Step 3: Cross multiply
    70,292.34x = 105,438.58 × 28,739.34
  4. Step 4: Simplify right side
    70,292.34x = 3,030,235,199.74
  5. Step 5: Solve for x
    x = 3,030,235,199.74/70,292.34
  6. Step 6: Final answer
    x = 43,109.04

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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.