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Finding the Fourth Proportional to 208,510.60, 287,638.62 and 131,900.68

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Solution

The fourth proportional to 208,510.60, 287,638.62 and 131,900.68 is: 181,955.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    208,510.60 : 287,638.62 = 131,900.68 : x
  2. Step 2: Convert to fraction form
    208,510.60/287,638.62 = 131,900.68/x
  3. Step 3: Cross multiply
    208,510.60x = 287,638.62 × 131,900.68
  4. Step 4: Simplify right side
    208,510.60x = 37,939,729,572.26
  5. Step 5: Solve for x
    x = 37,939,729,572.26/208,510.60
  6. Step 6: Final answer
    x = 181,955.88

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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.