Home / 209,891,358.90-289,742,965.72-135,588,156.82

Finding the Fourth Proportional to 209,891,358.90, 289,742,965.72 and 135,588,156.82

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Solution

The fourth proportional to 209,891,358.90, 289,742,965.72 and 135,588,156.82 is: 187,171,662.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    209,891,358.90 : 289,742,965.72 = 135,588,156.82 : x
  2. Step 2: Convert to fraction form
    209,891,358.90/289,742,965.72 = 135,588,156.82/x
  3. Step 3: Cross multiply
    209,891,358.90x = 289,742,965.72 × 135,588,156.82
  4. Step 4: Simplify right side
    209,891,358.90x = 39,285,714,672,471,912
  5. Step 5: Solve for x
    x = 39,285,714,672,471,912/209,891,358.90
  6. Step 6: Final answer
    x = 187,171,662.89

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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.