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Finding the Fourth Proportional to 70,679.32, 106,038.72 and 28,588.95

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Solution

The fourth proportional to 70,679.32, 106,038.72 and 28,588.95 is: 42,891.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,679.32 : 106,038.72 = 28,588.95 : x
  2. Step 2: Convert to fraction form
    70,679.32/106,038.72 = 28,588.95/x
  3. Step 3: Cross multiply
    70,679.32x = 106,038.72 × 28,588.95
  4. Step 4: Simplify right side
    70,679.32x = 3,031,535,664.14
  5. Step 5: Solve for x
    x = 3,031,535,664.14/70,679.32
  6. Step 6: Final answer
    x = 42,891.41

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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.