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Finding the Fourth Proportional to 129,612.63, 178,865.43 and 69,996.63

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Solution

The fourth proportional to 129,612.63, 178,865.43 and 69,996.63 is: 96,595.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,612.63 : 178,865.43 = 69,996.63 : x
  2. Step 2: Convert to fraction form
    129,612.63/178,865.43 = 69,996.63/x
  3. Step 3: Cross multiply
    129,612.63x = 178,865.43 × 69,996.63
  4. Step 4: Simplify right side
    129,612.63x = 12,519,977,323.50
  5. Step 5: Solve for x
    x = 12,519,977,323.50/129,612.63
  6. Step 6: Final answer
    x = 96,595.35

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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.