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Finding the Fourth Proportional to 133,386.35, 199,128.70 and 128,714.37

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Solution

The fourth proportional to 133,386.35, 199,128.70 and 128,714.37 is: 192,154.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    133,386.35 : 199,128.70 = 128,714.37 : x
  2. Step 2: Convert to fraction form
    133,386.35/199,128.70 = 128,714.37/x
  3. Step 3: Cross multiply
    133,386.35x = 199,128.70 × 128,714.37
  4. Step 4: Simplify right side
    133,386.35x = 25,630,724,945.59
  5. Step 5: Solve for x
    x = 25,630,724,945.59/133,386.35
  6. Step 6: Final answer
    x = 192,154.04

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.