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Finding the Fourth Proportional to 78,616.88, 117,855.62 and 56,374.28

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Solution

The fourth proportional to 78,616.88, 117,855.62 and 56,374.28 is: 84,511.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,616.88 : 117,855.62 = 56,374.28 : x
  2. Step 2: Convert to fraction form
    78,616.88/117,855.62 = 56,374.28/x
  3. Step 3: Cross multiply
    78,616.88x = 117,855.62 × 56,374.28
  4. Step 4: Simplify right side
    78,616.88x = 6,644,025,721.45
  5. Step 5: Solve for x
    x = 6,644,025,721.45/78,616.88
  6. Step 6: Final answer
    x = 84,511.44

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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.