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Finding the Fourth Proportional to 70,611.18, 105,916.69 and 18,020.67

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Solution

The fourth proportional to 70,611.18, 105,916.69 and 18,020.67 is: 27,030.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,611.18 : 105,916.69 = 18,020.67 : x
  2. Step 2: Convert to fraction form
    70,611.18/105,916.69 = 18,020.67/x
  3. Step 3: Cross multiply
    70,611.18x = 105,916.69 × 18,020.67
  4. Step 4: Simplify right side
    70,611.18x = 1,908,689,672.93
  5. Step 5: Solve for x
    x = 1,908,689,672.93/70,611.18
  6. Step 6: Final answer
    x = 27,030.98

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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.