Home / 385,912.70-578,869.05-105,429.95

Finding the Fourth Proportional to 385,912.70, 578,869.05 and 105,429.95

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Solution

The fourth proportional to 385,912.70, 578,869.05 and 105,429.95 is: 158,144.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    385,912.70 : 578,869.05 = 105,429.95 : x
  2. Step 2: Convert to fraction form
    385,912.70/578,869.05 = 105,429.95/x
  3. Step 3: Cross multiply
    385,912.70x = 578,869.05 × 105,429.95
  4. Step 4: Simplify right side
    385,912.70x = 61,030,134,998.05
  5. Step 5: Solve for x
    x = 61,030,134,998.05/385,912.70
  6. Step 6: Final answer
    x = 158,144.93

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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.