Home / 128,321,856.30-192,482,784.45-77,303,520.30

Finding the Fourth Proportional to 128,321,856.30, 192,482,784.45 and 77,303,520.30

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Solution

The fourth proportional to 128,321,856.30, 192,482,784.45 and 77,303,520.30 is: 115,955,280.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,321,856.30 : 192,482,784.45 = 77,303,520.30 : x
  2. Step 2: Convert to fraction form
    128,321,856.30/192,482,784.45 = 77,303,520.30/x
  3. Step 3: Cross multiply
    128,321,856.30x = 192,482,784.45 × 77,303,520.30
  4. Step 4: Simplify right side
    128,321,856.30x = 14,879,596,835,131,098
  5. Step 5: Solve for x
    x = 14,879,596,835,131,098/128,321,856.30
  6. Step 6: Final answer
    x = 115,955,280.45

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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.