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Finding the Fourth Proportional to 151,010.71, 208,405.64 and 90,583.90

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Solution

The fourth proportional to 151,010.71, 208,405.64 and 90,583.90 is: 125,012.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    151,010.71 : 208,405.64 = 90,583.90 : x
  2. Step 2: Convert to fraction form
    151,010.71/208,405.64 = 90,583.90/x
  3. Step 3: Cross multiply
    151,010.71x = 208,405.64 × 90,583.90
  4. Step 4: Simplify right side
    151,010.71x = 18,878,195,653.20
  5. Step 5: Solve for x
    x = 18,878,195,653.20/151,010.71
  6. Step 6: Final answer
    x = 125,012.30

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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.