Home / 208,125.42-312,175.17-128,178.60

Finding the Fourth Proportional to 208,125.42, 312,175.17 and 128,178.60

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Solution

The fourth proportional to 208,125.42, 312,175.17 and 128,178.60 is: 192,259.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    208,125.42 : 312,175.17 = 128,178.60 : x
  2. Step 2: Convert to fraction form
    208,125.42/312,175.17 = 128,178.60/x
  3. Step 3: Cross multiply
    208,125.42x = 312,175.17 × 128,178.60
  4. Step 4: Simplify right side
    208,125.42x = 40,014,176,245.36
  5. Step 5: Solve for x
    x = 40,014,176,245.36/208,125.42
  6. Step 6: Final answer
    x = 192,259.92

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.