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Finding the Fourth Proportional to 70,611.38, 105,916.97 and 18,020.86

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Solution

The fourth proportional to 70,611.38, 105,916.97 and 18,020.86 is: 27,031.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,611.38 : 105,916.97 = 18,020.86 : x
  2. Step 2: Convert to fraction form
    70,611.38/105,916.97 = 18,020.86/x
  3. Step 3: Cross multiply
    70,611.38x = 105,916.97 × 18,020.86
  4. Step 4: Simplify right side
    70,611.38x = 1,908,714,533.10
  5. Step 5: Solve for x
    x = 1,908,714,533.10/70,611.38
  6. Step 6: Final answer
    x = 27,031.26

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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.