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Finding the Fourth Proportional to 151,145.70, 208,609.93 and 100,068.31

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Solution

The fourth proportional to 151,145.70, 208,609.93 and 100,068.31 is: 138,113.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    151,145.70 : 208,609.93 = 100,068.31 : x
  2. Step 2: Convert to fraction form
    151,145.70/208,609.93 = 100,068.31/x
  3. Step 3: Cross multiply
    151,145.70x = 208,609.93 × 100,068.31
  4. Step 4: Simplify right side
    151,145.70x = 20,875,243,144.32
  5. Step 5: Solve for x
    x = 20,875,243,144.32/151,145.70
  6. Step 6: Final answer
    x = 138,113.38

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.