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Finding the Fourth Proportional to 127,670.60, 191,505.90 and 115,423.40

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Solution

The fourth proportional to 127,670.60, 191,505.90 and 115,423.40 is: 173,135.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    127,670.60 : 191,505.90 = 115,423.40 : x
  2. Step 2: Convert to fraction form
    127,670.60/191,505.90 = 115,423.40/x
  3. Step 3: Cross multiply
    127,670.60x = 191,505.90 × 115,423.40
  4. Step 4: Simplify right side
    127,670.60x = 22,104,262,098.06
  5. Step 5: Solve for x
    x = 22,104,262,098.06/127,670.60
  6. Step 6: Final answer
    x = 173,135.10

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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.