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Finding the Fourth Proportional to 139,952,003.90, 209,928,005.85 and 89,059,639.10

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Solution

The fourth proportional to 139,952,003.90, 209,928,005.85 and 89,059,639.10 is: 133,589,458.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,952,003.90 : 209,928,005.85 = 89,059,639.10 : x
  2. Step 2: Convert to fraction form
    139,952,003.90/209,928,005.85 = 89,059,639.10/x
  3. Step 3: Cross multiply
    139,952,003.90x = 209,928,005.85 × 89,059,639.10
  4. Step 4: Simplify right side
    139,952,003.90x = 18,696,112,437,983,688
  5. Step 5: Solve for x
    x = 18,696,112,437,983,688/139,952,003.90
  6. Step 6: Final answer
    x = 133,589,458.65

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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.