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Finding the Fourth Proportional to 70,610.63, 105,915.84 and 18,020.11

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Solution

The fourth proportional to 70,610.63, 105,915.84 and 18,020.11 is: 27,030.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,610.63 : 105,915.84 = 18,020.11 : x
  2. Step 2: Convert to fraction form
    70,610.63/105,915.84 = 18,020.11/x
  3. Step 3: Cross multiply
    70,610.63x = 105,915.84 × 18,020.11
  4. Step 4: Simplify right side
    70,610.63x = 1,908,614,822.75
  5. Step 5: Solve for x
    x = 1,908,614,822.75/70,610.63
  6. Step 6: Final answer
    x = 27,030.14

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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.