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Finding the Fourth Proportional to 256,677.99, 385,053.15 and 79,199.43

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Solution

The fourth proportional to 256,677.99, 385,053.15 and 79,199.43 is: 118,810.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    256,677.99 : 385,053.15 = 79,199.43 : x
  2. Step 2: Convert to fraction form
    256,677.99/385,053.15 = 79,199.43/x
  3. Step 3: Cross multiply
    256,677.99x = 385,053.15 × 79,199.43
  4. Step 4: Simplify right side
    256,677.99x = 30,495,989,999.70
  5. Step 5: Solve for x
    x = 30,495,989,999.70/256,677.99
  6. Step 6: Final answer
    x = 118,810.30

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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.