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Finding the Fourth Proportional to 139,509,391.19, 209,072,768.02 and 88,299,998.87

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Solution

The fourth proportional to 139,509,391.19, 209,072,768.02 and 88,299,998.87 is: 132,328,906.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,509,391.19 : 209,072,768.02 = 88,299,998.87 : x
  2. Step 2: Convert to fraction form
    139,509,391.19/209,072,768.02 = 88,299,998.87/x
  3. Step 3: Cross multiply
    139,509,391.19x = 209,072,768.02 × 88,299,998.87
  4. Step 4: Simplify right side
    139,509,391.19x = 18,461,125,179,913,776
  5. Step 5: Solve for x
    x = 18,461,125,179,913,776/139,509,391.19
  6. Step 6: Final answer
    x = 132,328,906.48

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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.