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Finding the Fourth Proportional to 68,955.74, 103,431.55 and 19,038.88

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Solution

The fourth proportional to 68,955.74, 103,431.55 and 19,038.88 is: 28,557.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,955.74 : 103,431.55 = 19,038.88 : x
  2. Step 2: Convert to fraction form
    68,955.74/103,431.55 = 19,038.88/x
  3. Step 3: Cross multiply
    68,955.74x = 103,431.55 × 19,038.88
  4. Step 4: Simplify right side
    68,955.74x = 1,969,220,868.66
  5. Step 5: Solve for x
    x = 1,969,220,868.66/68,955.74
  6. Step 6: Final answer
    x = 28,557.75

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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.