Home / 211,139.87-291,370.21-115,646.64

Finding the Fourth Proportional to 211,139.87, 291,370.21 and 115,646.64

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Solution

The fourth proportional to 211,139.87, 291,370.21 and 115,646.64 is: 159,590.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    211,139.87 : 291,370.21 = 115,646.64 : x
  2. Step 2: Convert to fraction form
    211,139.87/291,370.21 = 115,646.64/x
  3. Step 3: Cross multiply
    211,139.87x = 291,370.21 × 115,646.64
  4. Step 4: Simplify right side
    211,139.87x = 33,695,985,051.35
  5. Step 5: Solve for x
    x = 33,695,985,051.35/211,139.87
  6. Step 6: Final answer
    x = 159,590.82

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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.