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Finding the Fourth Proportional to 139,885.21, 209,860.59 and 55,650.16

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Solution

The fourth proportional to 139,885.21, 209,860.59 and 55,650.16 is: 83,488.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,885.21 : 209,860.59 = 55,650.16 : x
  2. Step 2: Convert to fraction form
    139,885.21/209,860.59 = 55,650.16/x
  3. Step 3: Cross multiply
    139,885.21x = 209,860.59 × 55,650.16
  4. Step 4: Simplify right side
    139,885.21x = 11,678,775,411.19
  5. Step 5: Solve for x
    x = 11,678,775,411.19/139,885.21
  6. Step 6: Final answer
    x = 83,488.28

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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.