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Finding the Fourth Proportional to 209,159.88, 288,642.48 and 113,666.58

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Solution

The fourth proportional to 209,159.88, 288,642.48 and 113,666.58 is: 156,860.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    209,159.88 : 288,642.48 = 113,666.58 : x
  2. Step 2: Convert to fraction form
    209,159.88/288,642.48 = 113,666.58/x
  3. Step 3: Cross multiply
    209,159.88x = 288,642.48 × 113,666.58
  4. Step 4: Simplify right side
    209,159.88x = 32,809,003,544.32
  5. Step 5: Solve for x
    x = 32,809,003,544.32/209,159.88
  6. Step 6: Final answer
    x = 156,860.88

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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.