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Finding the Fourth Proportional to 216,465.72, 298,529.24 and 135,900.72

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Solution

The fourth proportional to 216,465.72, 298,529.24 and 135,900.72 is: 187,421.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    216,465.72 : 298,529.24 = 135,900.72 : x
  2. Step 2: Convert to fraction form
    216,465.72/298,529.24 = 135,900.72/x
  3. Step 3: Cross multiply
    216,465.72x = 298,529.24 × 135,900.72
  4. Step 4: Simplify right side
    216,465.72x = 40,570,338,657.05
  5. Step 5: Solve for x
    x = 40,570,338,657.05/216,465.72
  6. Step 6: Final answer
    x = 187,421.54

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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.