Home / 209,928,216.59-289,665,066.62-121,802,012.76

Finding the Fourth Proportional to 209,928,216.59, 289,665,066.62 and 121,802,012.76

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Solution

The fourth proportional to 209,928,216.59, 289,665,066.62 and 121,802,012.76 is: 168,065,964.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    209,928,216.59 : 289,665,066.62 = 121,802,012.76 : x
  2. Step 2: Convert to fraction form
    209,928,216.59/289,665,066.62 = 121,802,012.76/x
  3. Step 3: Cross multiply
    209,928,216.59x = 289,665,066.62 × 121,802,012.76
  4. Step 4: Simplify right side
    209,928,216.59x = 35,281,788,140,982,980
  5. Step 5: Solve for x
    x = 35,281,788,140,982,980/209,928,216.59
  6. Step 6: Final answer
    x = 168,065,964.24

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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.