Home / 137,561,491.28-189,836,269.32-78,822,884.88

Finding the Fourth Proportional to 137,561,491.28, 189,836,269.32 and 78,822,884.88

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Solution

The fourth proportional to 137,561,491.28, 189,836,269.32 and 78,822,884.88 is: 108,776,389.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    137,561,491.28 : 189,836,269.32 = 78,822,884.88 : x
  2. Step 2: Convert to fraction form
    137,561,491.28/189,836,269.32 = 78,822,884.88/x
  3. Step 3: Cross multiply
    137,561,491.28x = 189,836,269.32 × 78,822,884.88
  4. Step 4: Simplify right side
    137,561,491.28x = 14,963,442,402,659,034
  5. Step 5: Solve for x
    x = 14,963,442,402,659,034/137,561,491.28
  6. Step 6: Final answer
    x = 108,776,389.84

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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.