Home / 129,519,967.20-194,028,008.40-78,249,688.80

Finding the Fourth Proportional to 129,519,967.20, 194,028,008.40 and 78,249,688.80

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Solution

The fourth proportional to 129,519,967.20, 194,028,008.40 and 78,249,688.80 is: 117,222,321.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,519,967.20 : 194,028,008.40 = 78,249,688.80 : x
  2. Step 2: Convert to fraction form
    129,519,967.20/194,028,008.40 = 78,249,688.80/x
  3. Step 3: Cross multiply
    129,519,967.20x = 194,028,008.40 × 78,249,688.80
  4. Step 4: Simplify right side
    129,519,967.20x = 15,182,631,275,783,786
  5. Step 5: Solve for x
    x = 15,182,631,275,783,786/129,519,967.20
  6. Step 6: Final answer
    x = 117,222,321.81

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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.