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Finding the Fourth Proportional to 129,768.75, 179,080.88 and 70,152.75

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Solution

The fourth proportional to 129,768.75, 179,080.88 and 70,152.75 is: 96,810.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,768.75 : 179,080.88 = 70,152.75 : x
  2. Step 2: Convert to fraction form
    129,768.75/179,080.88 = 70,152.75/x
  3. Step 3: Cross multiply
    129,768.75x = 179,080.88 × 70,152.75
  4. Step 4: Simplify right side
    129,768.75x = 12,563,015,853.66
  5. Step 5: Solve for x
    x = 12,563,015,853.66/129,768.75
  6. Step 6: Final answer
    x = 96,810.80

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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.