Home / 139,986.50-210,000.90-45,185

Finding the Fourth Proportional to 139,986.50, 210,000.90 and 45,185

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Solution

The fourth proportional to 139,986.50, 210,000.90 and 45,185 is: 67,784.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,986.50 : 210,000.90 = 45,185 : x
  2. Step 2: Convert to fraction form
    139,986.50/210,000.90 = 45,185/x
  3. Step 3: Cross multiply
    139,986.50x = 210,000.90 × 45,185
  4. Step 4: Simplify right side
    139,986.50x = 9,488,890,666.50
  5. Step 5: Solve for x
    x = 9,488,890,666.50/139,986.50
  6. Step 6: Final answer
    x = 67,784.33

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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.