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Finding the Fourth Proportional to 139,373,007.74, 209,014,754.65 and 45,978,985.21

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Solution

The fourth proportional to 139,373,007.74, 209,014,754.65 and 45,978,985.21 is: 68,953,712.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,373,007.74 : 209,014,754.65 = 45,978,985.21 : x
  2. Step 2: Convert to fraction form
    139,373,007.74/209,014,754.65 = 45,978,985.21/x
  3. Step 3: Cross multiply
    139,373,007.74x = 209,014,754.65 × 45,978,985.21
  4. Step 4: Simplify right side
    139,373,007.74x = 9,610,286,312,724,130
  5. Step 5: Solve for x
    x = 9,610,286,312,724,130/139,373,007.74
  6. Step 6: Final answer
    x = 68,953,712.55

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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.