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Finding the Fourth Proportional to 139,655,317.44, 192,709,839.60 and 86,001,449.28

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Solution

The fourth proportional to 139,655,317.44, 192,709,839.60 and 86,001,449.28 is: 118,673,071.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,655,317.44 : 192,709,839.60 = 86,001,449.28 : x
  2. Step 2: Convert to fraction form
    139,655,317.44/192,709,839.60 = 86,001,449.28/x
  3. Step 3: Cross multiply
    139,655,317.44x = 192,709,839.60 × 86,001,449.28
  4. Step 4: Simplify right side
    139,655,317.44x = 16,573,325,496,116,336
  5. Step 5: Solve for x
    x = 16,573,325,496,116,336/139,655,317.44
  6. Step 6: Final answer
    x = 118,673,071.67

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.