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Finding the Fourth Proportional to 207,881.70, 312,004.80 and 123,536.40

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Solution

The fourth proportional to 207,881.70, 312,004.80 and 123,536.40 is: 185,412.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    207,881.70 : 312,004.80 = 123,536.40 : x
  2. Step 2: Convert to fraction form
    207,881.70/312,004.80 = 123,536.40/x
  3. Step 3: Cross multiply
    207,881.70x = 312,004.80 × 123,536.40
  4. Step 4: Simplify right side
    207,881.70x = 38,543,949,774.72
  5. Step 5: Solve for x
    x = 38,543,949,774.72/207,881.70
  6. Step 6: Final answer
    x = 185,412.90

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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.