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Finding the Fourth Proportional to 139,566,491.66, 209,372,478.14 and 41,208,140.77

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Solution

The fourth proportional to 139,566,491.66, 209,372,478.14 and 41,208,140.77 is: 61,818,925.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,566,491.66 : 209,372,478.14 = 41,208,140.77 : x
  2. Step 2: Convert to fraction form
    139,566,491.66/209,372,478.14 = 41,208,140.77/x
  3. Step 3: Cross multiply
    139,566,491.66x = 209,372,478.14 × 41,208,140.77
  4. Step 4: Simplify right side
    139,566,491.66x = 8,627,850,552,136,457
  5. Step 5: Solve for x
    x = 8,627,850,552,136,457/139,566,491.66
  6. Step 6: Final answer
    x = 61,818,925.51

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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.