Home / 358,700,821.20-538,145,710.20-128,645,917.20

Finding the Fourth Proportional to 358,700,821.20, 538,145,710.20 and 128,645,917.20

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Solution

The fourth proportional to 358,700,821.20, 538,145,710.20 and 128,645,917.20 is: 193,002,759.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    358,700,821.20 : 538,145,710.20 = 128,645,917.20 : x
  2. Step 2: Convert to fraction form
    358,700,821.20/538,145,710.20 = 128,645,917.20/x
  3. Step 3: Cross multiply
    358,700,821.20x = 538,145,710.20 × 128,645,917.20
  4. Step 4: Simplify right side
    358,700,821.20x = 69,230,248,475,924,400
  5. Step 5: Solve for x
    x = 69,230,248,475,924,400/358,700,821.20
  6. Step 6: Final answer
    x = 193,002,759.92

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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.