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Finding the Fourth Proportional to 129,855.60, 194,783.40 and 115,421.40

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Solution

The fourth proportional to 129,855.60, 194,783.40 and 115,421.40 is: 173,132.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,855.60 : 194,783.40 = 115,421.40 : x
  2. Step 2: Convert to fraction form
    129,855.60/194,783.40 = 115,421.40/x
  3. Step 3: Cross multiply
    129,855.60x = 194,783.40 × 115,421.40
  4. Step 4: Simplify right side
    129,855.60x = 22,482,172,724.76
  5. Step 5: Solve for x
    x = 22,482,172,724.76/129,855.60
  6. Step 6: Final answer
    x = 173,132.10

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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.