Home / 128,768,021.20-193,152,031.80-87,953,352.40

Finding the Fourth Proportional to 128,768,021.20, 193,152,031.80 and 87,953,352.40

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Solution

The fourth proportional to 128,768,021.20, 193,152,031.80 and 87,953,352.40 is: 131,930,028.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,768,021.20 : 193,152,031.80 = 87,953,352.40 : x
  2. Step 2: Convert to fraction form
    128,768,021.20/193,152,031.80 = 87,953,352.40/x
  3. Step 3: Cross multiply
    128,768,021.20x = 193,152,031.80 × 87,953,352.40
  4. Step 4: Simplify right side
    128,768,021.20x = 16,988,368,719,681,408
  5. Step 5: Solve for x
    x = 16,988,368,719,681,408/128,768,021.20
  6. Step 6: Final answer
    x = 131,930,028.60

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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.