Home / 138,642,056.91-191,332,015.83-76,762,393.65

Finding the Fourth Proportional to 138,642,056.91, 191,332,015.83 and 76,762,393.65

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Solution

The fourth proportional to 138,642,056.91, 191,332,015.83 and 76,762,393.65 is: 105,935,412.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,642,056.91 : 191,332,015.83 = 76,762,393.65 : x
  2. Step 2: Convert to fraction form
    138,642,056.91/191,332,015.83 = 76,762,393.65/x
  3. Step 3: Cross multiply
    138,642,056.91x = 191,332,015.83 × 76,762,393.65
  4. Step 4: Simplify right side
    138,642,056.91x = 14,687,103,516,990,494
  5. Step 5: Solve for x
    x = 14,687,103,516,990,494/138,642,056.91
  6. Step 6: Final answer
    x = 105,935,412.70

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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.