Home / 139,969,218.70-209,953,828.05-128,064,940.30

Finding the Fourth Proportional to 139,969,218.70, 209,953,828.05 and 128,064,940.30

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Solution

The fourth proportional to 139,969,218.70, 209,953,828.05 and 128,064,940.30 is: 192,097,410.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,969,218.70 : 209,953,828.05 = 128,064,940.30 : x
  2. Step 2: Convert to fraction form
    139,969,218.70/209,953,828.05 = 128,064,940.30/x
  3. Step 3: Cross multiply
    139,969,218.70x = 209,953,828.05 × 128,064,940.30
  4. Step 4: Simplify right side
    139,969,218.70x = 26,887,724,454,979,716
  5. Step 5: Solve for x
    x = 26,887,724,454,979,716/139,969,218.70
  6. Step 6: Final answer
    x = 192,097,410.45

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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.