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Finding the Fourth Proportional to 208,860.72, 288,220.44 and 113,365.32

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Solution

The fourth proportional to 208,860.72, 288,220.44 and 113,365.32 is: 156,440.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    208,860.72 : 288,220.44 = 113,365.32 : x
  2. Step 2: Convert to fraction form
    208,860.72/288,220.44 = 113,365.32/x
  3. Step 3: Cross multiply
    208,860.72x = 288,220.44 × 113,365.32
  4. Step 4: Simplify right side
    208,860.72x = 32,674,202,411.14
  5. Step 5: Solve for x
    x = 32,674,202,411.14/208,860.72
  6. Step 6: Final answer
    x = 156,440.15

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1.5x scale

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.