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Finding the Fourth Proportional to 176,979,812.40, 265,469,718.60 and 128,606,871.60

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Solution

The fourth proportional to 176,979,812.40, 265,469,718.60 and 128,606,871.60 is: 192,910,307.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    176,979,812.40 : 265,469,718.60 = 128,606,871.60 : x
  2. Step 2: Convert to fraction form
    176,979,812.40/265,469,718.60 = 128,606,871.60/x
  3. Step 3: Cross multiply
    176,979,812.40x = 265,469,718.60 × 128,606,871.60
  4. Step 4: Simplify right side
    176,979,812.40x = 34,141,230,013,678,328
  5. Step 5: Solve for x
    x = 34,141,230,013,678,328/176,979,812.40
  6. Step 6: Final answer
    x = 192,910,307.40

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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.