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Finding the Fourth Proportional to 139,969,345.30, 209,954,017.95 and 49,060,129.30

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Solution

The fourth proportional to 139,969,345.30, 209,954,017.95 and 49,060,129.30 is: 73,590,193.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,969,345.30 : 209,954,017.95 = 49,060,129.30 : x
  2. Step 2: Convert to fraction form
    139,969,345.30/209,954,017.95 = 49,060,129.30/x
  3. Step 3: Cross multiply
    139,969,345.30x = 209,954,017.95 × 49,060,129.30
  4. Step 4: Simplify right side
    139,969,345.30x = 10,300,371,267,681,520
  5. Step 5: Solve for x
    x = 10,300,371,267,681,520/139,969,345.30
  6. Step 6: Final answer
    x = 73,590,193.95

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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.