Home / 128,897,926.78-193,344,997.05-31,853,631.76

Finding the Fourth Proportional to 128,897,926.78, 193,344,997.05 and 31,853,631.76

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Solution

The fourth proportional to 128,897,926.78, 193,344,997.05 and 31,853,631.76 is: 47,779,979.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,897,926.78 : 193,344,997.05 = 31,853,631.76 : x
  2. Step 2: Convert to fraction form
    128,897,926.78/193,344,997.05 = 31,853,631.76/x
  3. Step 3: Cross multiply
    128,897,926.78x = 193,344,997.05 × 31,853,631.76
  4. Step 4: Simplify right side
    128,897,926.78x = 6,158,740,339,183,488
  5. Step 5: Solve for x
    x = 6,158,740,339,183,488/128,897,926.78
  6. Step 6: Final answer
    x = 47,779,979.81

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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.