Home / 193,421,969.90-289,881,012.45-78,312,286.70

Finding the Fourth Proportional to 193,421,969.90, 289,881,012.45 and 78,312,286.70

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Solution

The fourth proportional to 193,421,969.90, 289,881,012.45 and 78,312,286.70 is: 117,366,424.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    193,421,969.90 : 289,881,012.45 = 78,312,286.70 : x
  2. Step 2: Convert to fraction form
    193,421,969.90/289,881,012.45 = 78,312,286.70/x
  3. Step 3: Cross multiply
    193,421,969.90x = 289,881,012.45 × 78,312,286.70
  4. Step 4: Simplify right side
    193,421,969.90x = 22,701,244,955,870,668
  5. Step 5: Solve for x
    x = 22,701,244,955,870,668/193,421,969.90
  6. Step 6: Final answer
    x = 117,366,424.13

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.