Home / 258,619.59-387,913.28-123,779.43

Finding the Fourth Proportional to 258,619.59, 387,913.28 and 123,779.43

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Solution

The fourth proportional to 258,619.59, 387,913.28 and 123,779.43 is: 185,661.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    258,619.59 : 387,913.28 = 123,779.43 : x
  2. Step 2: Convert to fraction form
    258,619.59/387,913.28 = 123,779.43/x
  3. Step 3: Cross multiply
    258,619.59x = 387,913.28 × 123,779.43
  4. Step 4: Simplify right side
    258,619.59x = 48,015,684,068.93
  5. Step 5: Solve for x
    x = 48,015,684,068.93/258,619.59
  6. Step 6: Final answer
    x = 185,661.43

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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.