Home / 78,112,281.80-117,168,422.70-21,378,585.80

Finding the Fourth Proportional to 78,112,281.80, 117,168,422.70 and 21,378,585.80

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Solution

The fourth proportional to 78,112,281.80, 117,168,422.70 and 21,378,585.80 is: 32,067,878.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,112,281.80 : 117,168,422.70 = 21,378,585.80 : x
  2. Step 2: Convert to fraction form
    78,112,281.80/117,168,422.70 = 21,378,585.80/x
  3. Step 3: Cross multiply
    78,112,281.80x = 117,168,422.70 × 21,378,585.80
  4. Step 4: Simplify right side
    78,112,281.80x = 2,504,895,177,742,618
  5. Step 5: Solve for x
    x = 2,504,895,177,742,618/78,112,281.80
  6. Step 6: Final answer
    x = 32,067,878.70

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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.