Home / 221,338,530.62-305,474,102.92-128,519,038.16

Finding the Fourth Proportional to 221,338,530.62, 305,474,102.92 and 128,519,038.16

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Solution

The fourth proportional to 221,338,530.62, 305,474,102.92 and 128,519,038.16 is: 177,371,909.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    221,338,530.62 : 305,474,102.92 = 128,519,038.16 : x
  2. Step 2: Convert to fraction form
    221,338,530.62/305,474,102.92 = 128,519,038.16/x
  3. Step 3: Cross multiply
    221,338,530.62x = 305,474,102.92 × 128,519,038.16
  4. Step 4: Simplify right side
    221,338,530.62x = 39,259,237,890,067,248
  5. Step 5: Solve for x
    x = 39,259,237,890,067,248/221,338,530.62
  6. Step 6: Final answer
    x = 177,371,909.81

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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.