Home / 128,935,855.20-193,403,782.80-42,682,980.90

Finding the Fourth Proportional to 128,935,855.20, 193,403,782.80 and 42,682,980.90

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Solution

The fourth proportional to 128,935,855.20, 193,403,782.80 and 42,682,980.90 is: 64,024,471.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,935,855.20 : 193,403,782.80 = 42,682,980.90 : x
  2. Step 2: Convert to fraction form
    128,935,855.20/193,403,782.80 = 42,682,980.90/x
  3. Step 3: Cross multiply
    128,935,855.20x = 193,403,782.80 × 42,682,980.90
  4. Step 4: Simplify right side
    128,935,855.20x = 8,255,049,967,240,149
  5. Step 5: Solve for x
    x = 8,255,049,967,240,149/128,935,855.20
  6. Step 6: Final answer
    x = 64,024,471.35

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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.