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Finding the Fourth Proportional to 139,235.64, 208,820.01 and 64,283.78

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Solution

The fourth proportional to 139,235.64, 208,820.01 and 64,283.78 is: 96,410.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,235.64 : 208,820.01 = 64,283.78 : x
  2. Step 2: Convert to fraction form
    139,235.64/208,820.01 = 64,283.78/x
  3. Step 3: Cross multiply
    139,235.64x = 208,820.01 × 64,283.78
  4. Step 4: Simplify right side
    139,235.64x = 13,423,738,538.34
  5. Step 5: Solve for x
    x = 13,423,738,538.34/139,235.64
  6. Step 6: Final answer
    x = 96,410.22

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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.