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Finding the Fourth Proportional to 70,325.10, 105,488.09 and 28,772.10

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Solution

The fourth proportional to 70,325.10, 105,488.09 and 28,772.10 is: 43,158.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,325.10 : 105,488.09 = 28,772.10 : x
  2. Step 2: Convert to fraction form
    70,325.10/105,488.09 = 28,772.10/x
  3. Step 3: Cross multiply
    70,325.10x = 105,488.09 × 28,772.10
  4. Step 4: Simplify right side
    70,325.10x = 3,035,113,874.29
  5. Step 5: Solve for x
    x = 3,035,113,874.29/70,325.10
  6. Step 6: Final answer
    x = 43,158.33

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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.