Home / 128,891,360.40-177,873,926.74-79,360,308.74

Finding the Fourth Proportional to 128,891,360.40, 177,873,926.74 and 79,360,308.74

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Solution

The fourth proportional to 128,891,360.40, 177,873,926.74 and 79,360,308.74 is: 109,519,596.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,891,360.40 : 177,873,926.74 = 79,360,308.74 : x
  2. Step 2: Convert to fraction form
    128,891,360.40/177,873,926.74 = 79,360,308.74/x
  3. Step 3: Cross multiply
    128,891,360.40x = 177,873,926.74 × 79,360,308.74
  4. Step 4: Simplify right side
    128,891,360.40x = 14,116,129,742,882,542
  5. Step 5: Solve for x
    x = 14,116,129,742,882,542/128,891,360.40
  6. Step 6: Final answer
    x = 109,519,596.19

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.