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Finding the Fourth Proportional to 216,455.76, 298,703.79 and 120,980.93

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Solution

The fourth proportional to 216,455.76, 298,703.79 and 120,980.93 is: 166,950.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    216,455.76 : 298,703.79 = 120,980.93 : x
  2. Step 2: Convert to fraction form
    216,455.76/298,703.79 = 120,980.93/x
  3. Step 3: Cross multiply
    216,455.76x = 298,703.79 × 120,980.93
  4. Step 4: Simplify right side
    216,455.76x = 36,137,460,815.21
  5. Step 5: Solve for x
    x = 36,137,460,815.21/216,455.76
  6. Step 6: Final answer
    x = 166,950.79

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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.