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Finding the Fourth Proportional to 129,864.60, 194,796.90 and 115,430.40

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Solution

The fourth proportional to 129,864.60, 194,796.90 and 115,430.40 is: 173,145.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,864.60 : 194,796.90 = 115,430.40 : x
  2. Step 2: Convert to fraction form
    129,864.60/194,796.90 = 115,430.40/x
  3. Step 3: Cross multiply
    129,864.60x = 194,796.90 × 115,430.40
  4. Step 4: Simplify right side
    129,864.60x = 22,485,484,085.76
  5. Step 5: Solve for x
    x = 22,485,484,085.76/129,864.60
  6. Step 6: Final answer
    x = 173,145.60

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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.