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Finding the Fourth Proportional to 149,461.47, 206,330.47 and 103,555.93

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Solution

The fourth proportional to 149,461.47, 206,330.47 and 103,555.93 is: 142,958.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    149,461.47 : 206,330.47 = 103,555.93 : x
  2. Step 2: Convert to fraction form
    149,461.47/206,330.47 = 103,555.93/x
  3. Step 3: Cross multiply
    149,461.47x = 206,330.47 × 103,555.93
  4. Step 4: Simplify right side
    149,461.47x = 21,366,742,933.47
  5. Step 5: Solve for x
    x = 21,366,742,933.47/149,461.47
  6. Step 6: Final answer
    x = 142,958.20

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.