Home / 385,408.32-578,175.12-119,106.72

Finding the Fourth Proportional to 385,408.32, 578,175.12 and 119,106.72

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Solution

The fourth proportional to 385,408.32, 578,175.12 and 119,106.72 is: 178,679.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    385,408.32 : 578,175.12 = 119,106.72 : x
  2. Step 2: Convert to fraction form
    385,408.32/578,175.12 = 119,106.72/x
  3. Step 3: Cross multiply
    385,408.32x = 578,175.12 × 119,106.72
  4. Step 4: Simplify right side
    385,408.32x = 68,864,542,128.81
  5. Step 5: Solve for x
    x = 68,864,542,128.81/385,408.32
  6. Step 6: Final answer
    x = 178,679.44

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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.