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Finding the Fourth Proportional to 219,639.60, 328,803.30 and 130,847.40

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Solution

The fourth proportional to 219,639.60, 328,803.30 and 130,847.40 is: 195,880.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    219,639.60 : 328,803.30 = 130,847.40 : x
  2. Step 2: Convert to fraction form
    219,639.60/328,803.30 = 130,847.40/x
  3. Step 3: Cross multiply
    219,639.60x = 328,803.30 × 130,847.40
  4. Step 4: Simplify right side
    219,639.60x = 43,023,056,916.42
  5. Step 5: Solve for x
    x = 43,023,056,916.42/219,639.60
  6. Step 6: Final answer
    x = 195,880.24

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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.