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Finding the Fourth Proportional to 68,978.88, 103,465.44 and 19,730.88

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Solution

The fourth proportional to 68,978.88, 103,465.44 and 19,730.88 is: 29,595.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,978.88 : 103,465.44 = 19,730.88 : x
  2. Step 2: Convert to fraction form
    68,978.88/103,465.44 = 19,730.88/x
  3. Step 3: Cross multiply
    68,978.88x = 103,465.44 × 19,730.88
  4. Step 4: Simplify right side
    68,978.88x = 2,041,464,180.79
  5. Step 5: Solve for x
    x = 2,041,464,180.79/68,978.88
  6. Step 6: Final answer
    x = 29,595.50

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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.