Home / 135,168,015.20-202,752,022.80-81,287,592.80

Finding the Fourth Proportional to 135,168,015.20, 202,752,022.80 and 81,287,592.80

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Solution

The fourth proportional to 135,168,015.20, 202,752,022.80 and 81,287,592.80 is: 121,931,389.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    135,168,015.20 : 202,752,022.80 = 81,287,592.80 : x
  2. Step 2: Convert to fraction form
    135,168,015.20/202,752,022.80 = 81,287,592.80/x
  3. Step 3: Cross multiply
    135,168,015.20x = 202,752,022.80 × 81,287,592.80
  4. Step 4: Simplify right side
    135,168,015.20x = 16,481,223,868,742,716
  5. Step 5: Solve for x
    x = 16,481,223,868,742,716/135,168,015.20
  6. Step 6: Final answer
    x = 121,931,389.20

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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.