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Finding the Fourth Proportional to 139,461.60, 209,170.38 and 60,554.64

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Solution

The fourth proportional to 139,461.60, 209,170.38 and 60,554.64 is: 90,822.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,461.60 : 209,170.38 = 60,554.64 : x
  2. Step 2: Convert to fraction form
    139,461.60/209,170.38 = 60,554.64/x
  3. Step 3: Cross multiply
    139,461.60x = 209,170.38 × 60,554.64
  4. Step 4: Simplify right side
    139,461.60x = 12,666,237,059.56
  5. Step 5: Solve for x
    x = 12,666,237,059.56/139,461.60
  6. Step 6: Final answer
    x = 90,822.40

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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.