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Finding the Fourth Proportional to 129,683.94, 179,008.49 and 75,986.34

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Solution

The fourth proportional to 129,683.94, 179,008.49 and 75,986.34 is: 104,887.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,683.94 : 179,008.49 = 75,986.34 : x
  2. Step 2: Convert to fraction form
    129,683.94/179,008.49 = 75,986.34/x
  3. Step 3: Cross multiply
    129,683.94x = 179,008.49 × 75,986.34
  4. Step 4: Simplify right side
    129,683.94x = 13,602,199,604.09
  5. Step 5: Solve for x
    x = 13,602,199,604.09/129,683.94
  6. Step 6: Final answer
    x = 104,887.31

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.