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Finding the Fourth Proportional to 138,984.81, 208,475.16 and 44,220.74

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Solution

The fourth proportional to 138,984.81, 208,475.16 and 44,220.74 is: 66,330.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,984.81 : 208,475.16 = 44,220.74 : x
  2. Step 2: Convert to fraction form
    138,984.81/208,475.16 = 44,220.74/x
  3. Step 3: Cross multiply
    138,984.81x = 208,475.16 × 44,220.74
  4. Step 4: Simplify right side
    138,984.81x = 9,218,924,804.44
  5. Step 5: Solve for x
    x = 9,218,924,804.44/138,984.81
  6. Step 6: Final answer
    x = 66,330.45

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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.