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Finding the Fourth Proportional to 316,978.14, 475,000.65 and 139,322.46

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Solution

The fourth proportional to 316,978.14, 475,000.65 and 139,322.46 is: 208,778.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    316,978.14 : 475,000.65 = 139,322.46 : x
  2. Step 2: Convert to fraction form
    316,978.14/475,000.65 = 139,322.46/x
  3. Step 3: Cross multiply
    316,978.14x = 475,000.65 × 139,322.46
  4. Step 4: Simplify right side
    316,978.14x = 66,178,259,059.60
  5. Step 5: Solve for x
    x = 66,178,259,059.60/316,978.14
  6. Step 6: Final answer
    x = 208,778.62

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These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.