Home / 129,843,140.40-195,048,145.80-91,579,388.40

Finding the Fourth Proportional to 129,843,140.40, 195,048,145.80 and 91,579,388.40

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Solution

The fourth proportional to 129,843,140.40, 195,048,145.80 and 91,579,388.40 is: 137,568,991.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,843,140.40 : 195,048,145.80 = 91,579,388.40 : x
  2. Step 2: Convert to fraction form
    129,843,140.40/195,048,145.80 = 91,579,388.40/x
  3. Step 3: Cross multiply
    129,843,140.40x = 195,048,145.80 × 91,579,388.40
  4. Step 4: Simplify right side
    129,843,140.40x = 17,862,389,900,918,030
  5. Step 5: Solve for x
    x = 17,862,389,900,918,030/129,843,140.40
  6. Step 6: Final answer
    x = 137,568,991.68

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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.