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Finding the Fourth Proportional to 370,045.76, 555,156.96 and 120,728

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Solution

The fourth proportional to 370,045.76, 555,156.96 and 120,728 is: 181,120.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    370,045.76 : 555,156.96 = 120,728 : x
  2. Step 2: Convert to fraction form
    370,045.76/555,156.96 = 120,728/x
  3. Step 3: Cross multiply
    370,045.76x = 555,156.96 × 120,728
  4. Step 4: Simplify right side
    370,045.76x = 67,022,989,466.88
  5. Step 5: Solve for x
    x = 67,022,989,466.88/370,045.76
  6. Step 6: Final answer
    x = 181,120.81

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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.