Home / 128,952,081.20-193,428,121.80-103,442,913.20

Finding the Fourth Proportional to 128,952,081.20, 193,428,121.80 and 103,442,913.20

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Solution

The fourth proportional to 128,952,081.20, 193,428,121.80 and 103,442,913.20 is: 155,164,369.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,952,081.20 : 193,428,121.80 = 103,442,913.20 : x
  2. Step 2: Convert to fraction form
    128,952,081.20/193,428,121.80 = 103,442,913.20/x
  3. Step 3: Cross multiply
    128,952,081.20x = 193,428,121.80 × 103,442,913.20
  4. Step 4: Simplify right side
    128,952,081.20x = 20,008,768,413,796,428
  5. Step 5: Solve for x
    x = 20,008,768,413,796,428/128,952,081.20
  6. Step 6: Final answer
    x = 155,164,369.80

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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.