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Finding the Fourth Proportional to 256,618.19, 384,902.54 and 79,077.53

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Solution

The fourth proportional to 256,618.19, 384,902.54 and 79,077.53 is: 118,608.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    256,618.19 : 384,902.54 = 79,077.53 : x
  2. Step 2: Convert to fraction form
    256,618.19/384,902.54 = 79,077.53/x
  3. Step 3: Cross multiply
    256,618.19x = 384,902.54 × 79,077.53
  4. Step 4: Simplify right side
    256,618.19x = 30,437,139,834.03
  5. Step 5: Solve for x
    x = 30,437,139,834.03/256,618.19
  6. Step 6: Final answer
    x = 118,608.66

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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.