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Finding the Fourth Proportional to 187,907.70, 281,205.45 and 128,858.70

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Solution

The fourth proportional to 187,907.70, 281,205.45 and 128,858.70 is: 192,838.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    187,907.70 : 281,205.45 = 128,858.70 : x
  2. Step 2: Convert to fraction form
    187,907.70/281,205.45 = 128,858.70/x
  3. Step 3: Cross multiply
    187,907.70x = 281,205.45 × 128,858.70
  4. Step 4: Simplify right side
    187,907.70x = 36,235,768,719.92
  5. Step 5: Solve for x
    x = 36,235,768,719.92/187,907.70
  6. Step 6: Final answer
    x = 192,838.13

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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.