Home / 221,586,709.86-305,827,631.10-128,821,026.11

Finding the Fourth Proportional to 221,586,709.86, 305,827,631.10 and 128,821,026.11

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Solution

The fourth proportional to 221,586,709.86, 305,827,631.10 and 128,821,026.11 is: 177,795,091.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    221,586,709.86 : 305,827,631.10 = 128,821,026.11 : x
  2. Step 2: Convert to fraction form
    221,586,709.86/305,827,631.10 = 128,821,026.11/x
  3. Step 3: Cross multiply
    221,586,709.86x = 305,827,631.10 × 128,821,026.11
  4. Step 4: Simplify right side
    221,586,709.86x = 39,397,029,249,563,416
  5. Step 5: Solve for x
    x = 39,397,029,249,563,416/221,586,709.86
  6. Step 6: Final answer
    x = 177,795,091.03

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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.