Home / 209,928,217.59-289,665,068-121,802,013.76

Finding the Fourth Proportional to 209,928,217.59, 289,665,068 and 121,802,013.76

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Solution

The fourth proportional to 209,928,217.59, 289,665,068 and 121,802,013.76 is: 168,065,965.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    209,928,217.59 : 289,665,068 = 121,802,013.76 : x
  2. Step 2: Convert to fraction form
    209,928,217.59/289,665,068 = 121,802,013.76/x
  3. Step 3: Cross multiply
    209,928,217.59x = 289,665,068 × 121,802,013.76
  4. Step 4: Simplify right side
    209,928,217.59x = 35,281,788,598,327,336
  5. Step 5: Solve for x
    x = 35,281,788,598,327,336/209,928,217.59
  6. Step 6: Final answer
    x = 168,065,965.61

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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.