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Finding the Fourth Proportional to 70,127.85, 105,129.20 and 30,653.72

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Solution

The fourth proportional to 70,127.85, 105,129.20 and 30,653.72 is: 45,953.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,127.85 : 105,129.20 = 30,653.72 : x
  2. Step 2: Convert to fraction form
    70,127.85/105,129.20 = 30,653.72/x
  3. Step 3: Cross multiply
    70,127.85x = 105,129.20 × 30,653.72
  4. Step 4: Simplify right side
    70,127.85x = 3,222,600,611.61
  5. Step 5: Solve for x
    x = 3,222,600,611.61/70,127.85
  6. Step 6: Final answer
    x = 45,953.22

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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.