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Finding the Fourth Proportional to 129,602.50, 178,851.45 and 69,986.50

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Solution

The fourth proportional to 129,602.50, 178,851.45 and 69,986.50 is: 96,581.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,602.50 : 178,851.45 = 69,986.50 : x
  2. Step 2: Convert to fraction form
    129,602.50/178,851.45 = 69,986.50/x
  3. Step 3: Cross multiply
    129,602.50x = 178,851.45 × 69,986.50
  4. Step 4: Simplify right side
    129,602.50x = 12,517,187,005.43
  5. Step 5: Solve for x
    x = 12,517,187,005.43/129,602.50
  6. Step 6: Final answer
    x = 96,581.37

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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.