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Finding the Fourth Proportional to 128,014.72, 176,611.04 and 80,184.80

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Solution

The fourth proportional to 128,014.72, 176,611.04 and 80,184.80 is: 110,624.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,014.72 : 176,611.04 = 80,184.80 : x
  2. Step 2: Convert to fraction form
    128,014.72/176,611.04 = 80,184.80/x
  3. Step 3: Cross multiply
    128,014.72x = 176,611.04 × 80,184.80
  4. Step 4: Simplify right side
    128,014.72x = 14,161,520,920.19
  5. Step 5: Solve for x
    x = 14,161,520,920.19/128,014.72
  6. Step 6: Final answer
    x = 110,624.16

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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.