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Finding the Fourth Proportional to 216,651.85, 298,970.57 and 118,534.61

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Solution

The fourth proportional to 216,651.85, 298,970.57 and 118,534.61 is: 163,572.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    216,651.85 : 298,970.57 = 118,534.61 : x
  2. Step 2: Convert to fraction form
    216,651.85/298,970.57 = 118,534.61/x
  3. Step 3: Cross multiply
    216,651.85x = 298,970.57 × 118,534.61
  4. Step 4: Simplify right side
    216,651.85x = 35,438,359,916.43
  5. Step 5: Solve for x
    x = 35,438,359,916.43/216,651.85
  6. Step 6: Final answer
    x = 163,572.85

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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.