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Finding the Fourth Proportional to 136,361.60, 204,502.08 and 61,438.40

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Solution

The fourth proportional to 136,361.60, 204,502.08 and 61,438.40 is: 92,139.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,361.60 : 204,502.08 = 61,438.40 : x
  2. Step 2: Convert to fraction form
    136,361.60/204,502.08 = 61,438.40/x
  3. Step 3: Cross multiply
    136,361.60x = 204,502.08 × 61,438.40
  4. Step 4: Simplify right side
    136,361.60x = 12,564,280,591.87
  5. Step 5: Solve for x
    x = 12,564,280,591.87/136,361.60
  6. Step 6: Final answer
    x = 92,139.43

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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.