Home / 216,455.70-298,515.45-135,890.73

Finding the Fourth Proportional to 216,455.70, 298,515.45 and 135,890.73

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Solution

The fourth proportional to 216,455.70, 298,515.45 and 135,890.73 is: 187,407.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    216,455.70 : 298,515.45 = 135,890.73 : x
  2. Step 2: Convert to fraction form
    216,455.70/298,515.45 = 135,890.73/x
  3. Step 3: Cross multiply
    216,455.70x = 298,515.45 × 135,890.73
  4. Step 4: Simplify right side
    216,455.70x = 40,565,482,416.78
  5. Step 5: Solve for x
    x = 40,565,482,416.78/216,455.70
  6. Step 6: Final answer
    x = 187,407.78

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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.