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Finding the Fourth Proportional to 208,389.17, 287,471.32 and 131,779.17

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Solution

The fourth proportional to 208,389.17, 287,471.32 and 131,779.17 is: 181,788.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    208,389.17 : 287,471.32 = 131,779.17 : x
  2. Step 2: Convert to fraction form
    208,389.17/287,471.32 = 131,779.17/x
  3. Step 3: Cross multiply
    208,389.17x = 287,471.32 × 131,779.17
  4. Step 4: Simplify right side
    208,389.17x = 37,882,731,618.96
  5. Step 5: Solve for x
    x = 37,882,731,618.96/208,389.17
  6. Step 6: Final answer
    x = 181,788.39

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1.5x scale

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.