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Finding the Fourth Proportional to 152,372.68, 228,690.30 and 85,878.28

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Solution

The fourth proportional to 152,372.68, 228,690.30 and 85,878.28 is: 128,891.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    152,372.68 : 228,690.30 = 85,878.28 : x
  2. Step 2: Convert to fraction form
    152,372.68/228,690.30 = 85,878.28/x
  3. Step 3: Cross multiply
    152,372.68x = 228,690.30 × 85,878.28
  4. Step 4: Simplify right side
    152,372.68x = 19,639,529,616.68
  5. Step 5: Solve for x
    x = 19,639,529,616.68/152,372.68
  6. Step 6: Final answer
    x = 128,891.41

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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.