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Finding the Fourth Proportional to 129,875.60, 194,813.40 and 103,631.60

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Solution

The fourth proportional to 129,875.60, 194,813.40 and 103,631.60 is: 155,447.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,875.60 : 194,813.40 = 103,631.60 : x
  2. Step 2: Convert to fraction form
    129,875.60/194,813.40 = 103,631.60/x
  3. Step 3: Cross multiply
    129,875.60x = 194,813.40 × 103,631.60
  4. Step 4: Simplify right side
    129,875.60x = 20,188,824,343.44
  5. Step 5: Solve for x
    x = 20,188,824,343.44/129,875.60
  6. Step 6: Final answer
    x = 155,447.40

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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.