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Finding the Fourth Proportional to 70,125.66, 105,188.63 and 30,685.82

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Solution

The fourth proportional to 70,125.66, 105,188.63 and 30,685.82 is: 46,028.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,125.66 : 105,188.63 = 30,685.82 : x
  2. Step 2: Convert to fraction form
    70,125.66/105,188.63 = 30,685.82/x
  3. Step 3: Cross multiply
    70,125.66x = 105,188.63 × 30,685.82
  4. Step 4: Simplify right side
    70,125.66x = 3,227,798,686.85
  5. Step 5: Solve for x
    x = 3,227,798,686.85/70,125.66
  6. Step 6: Final answer
    x = 46,028.78

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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.