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Finding the Fourth Proportional to 70,322.46, 105,445.86 and 28,181.40

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Solution

The fourth proportional to 70,322.46, 105,445.86 and 28,181.40 is: 42,256.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,322.46 : 105,445.86 = 28,181.40 : x
  2. Step 2: Convert to fraction form
    70,322.46/105,445.86 = 28,181.40/x
  3. Step 3: Cross multiply
    70,322.46x = 105,445.86 × 28,181.40
  4. Step 4: Simplify right side
    70,322.46x = 2,971,611,959.00
  5. Step 5: Solve for x
    x = 2,971,611,959.00/70,322.46
  6. Step 6: Final answer
    x = 42,256.94

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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.