Home / 428,896,176.68-643,237,976.79-122,190,946.76

Finding the Fourth Proportional to 428,896,176.68, 643,237,976.79 and 122,190,946.76

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Solution

The fourth proportional to 428,896,176.68, 643,237,976.79 and 122,190,946.76 is: 183,256,139.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    428,896,176.68 : 643,237,976.79 = 122,190,946.76 : x
  2. Step 2: Convert to fraction form
    428,896,176.68/643,237,976.79 = 122,190,946.76/x
  3. Step 3: Cross multiply
    428,896,176.68x = 643,237,976.79 × 122,190,946.76
  4. Step 4: Simplify right side
    428,896,176.68x = 78,597,857,375,957,008
  5. Step 5: Solve for x
    x = 78,597,857,375,957,008/428,896,176.68
  6. Step 6: Final answer
    x = 183,256,139.01

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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.