Home / 221,161,159.18-305,263,111.08-128,371,560.58

Finding the Fourth Proportional to 221,161,159.18, 305,263,111.08 and 128,371,560.58

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Solution

The fourth proportional to 221,161,159.18, 305,263,111.08 and 128,371,560.58 is: 177,187,993.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    221,161,159.18 : 305,263,111.08 = 128,371,560.58 : x
  2. Step 2: Convert to fraction form
    221,161,159.18/305,263,111.08 = 128,371,560.58/x
  3. Step 3: Cross multiply
    221,161,159.18x = 305,263,111.08 × 128,371,560.58
  4. Step 4: Simplify right side
    221,161,159.18x = 39,187,101,956,845,488
  5. Step 5: Solve for x
    x = 39,187,101,956,845,488/221,161,159.18
  6. Step 6: Final answer
    x = 177,187,993.15

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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.