Home / 258,731.63-387,666.82-90,159.05

Finding the Fourth Proportional to 258,731.63, 387,666.82 and 90,159.05

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Solution

The fourth proportional to 258,731.63, 387,666.82 and 90,159.05 is: 135,088.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    258,731.63 : 387,666.82 = 90,159.05 : x
  2. Step 2: Convert to fraction form
    258,731.63/387,666.82 = 90,159.05/x
  3. Step 3: Cross multiply
    258,731.63x = 387,666.82 × 90,159.05
  4. Step 4: Simplify right side
    258,731.63x = 34,951,672,207.72
  5. Step 5: Solve for x
    x = 34,951,672,207.72/258,731.63
  6. Step 6: Final answer
    x = 135,088.52

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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.