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Finding the Fourth Proportional to 70,232.57, 105,348.95 and 28,679.57

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Solution

The fourth proportional to 70,232.57, 105,348.95 and 28,679.57 is: 43,019.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,232.57 : 105,348.95 = 28,679.57 : x
  2. Step 2: Convert to fraction form
    70,232.57/105,348.95 = 28,679.57/x
  3. Step 3: Cross multiply
    70,232.57x = 105,348.95 × 28,679.57
  4. Step 4: Simplify right side
    70,232.57x = 3,021,361,915.81
  5. Step 5: Solve for x
    x = 3,021,361,915.81/70,232.57
  6. Step 6: Final answer
    x = 43,019.39

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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.