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Finding the Fourth Proportional to 139,239.38, 208,825.56 and 64,287.51

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Solution

The fourth proportional to 139,239.38, 208,825.56 and 64,287.51 is: 96,415.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,239.38 : 208,825.56 = 64,287.51 : x
  2. Step 2: Convert to fraction form
    139,239.38/208,825.56 = 64,287.51/x
  3. Step 3: Cross multiply
    139,239.38x = 208,825.56 × 64,287.51
  4. Step 4: Simplify right side
    139,239.38x = 13,424,875,276.76
  5. Step 5: Solve for x
    x = 13,424,875,276.76/139,239.38
  6. Step 6: Final answer
    x = 96,415.80

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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.