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Finding the Fourth Proportional to 216,008.40, 323,969.40 and 103,688.40

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Solution

The fourth proportional to 216,008.40, 323,969.40 and 103,688.40 is: 155,511.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    216,008.40 : 323,969.40 = 103,688.40 : x
  2. Step 2: Convert to fraction form
    216,008.40/323,969.40 = 103,688.40/x
  3. Step 3: Cross multiply
    216,008.40x = 323,969.40 × 103,688.40
  4. Step 4: Simplify right side
    216,008.40x = 33,591,868,734.96
  5. Step 5: Solve for x
    x = 33,591,868,734.96/216,008.40
  6. Step 6: Final answer
    x = 155,511.86

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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.