Home / 128,935,853.70-193,403,780.55-42,682,979.40

Finding the Fourth Proportional to 128,935,853.70, 193,403,780.55 and 42,682,979.40

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Solution

The fourth proportional to 128,935,853.70, 193,403,780.55 and 42,682,979.40 is: 64,024,469.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,935,853.70 : 193,403,780.55 = 42,682,979.40 : x
  2. Step 2: Convert to fraction form
    128,935,853.70/193,403,780.55 = 42,682,979.40/x
  3. Step 3: Cross multiply
    128,935,853.70x = 193,403,780.55 × 42,682,979.40
  4. Step 4: Simplify right side
    128,935,853.70x = 8,255,049,581,097,771
  5. Step 5: Solve for x
    x = 8,255,049,581,097,771/128,935,853.70
  6. Step 6: Final answer
    x = 64,024,469.10

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1.5x scale

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.