Home / 258,520.64-387,780.96-81,041.36

Finding the Fourth Proportional to 258,520.64, 387,780.96 and 81,041.36

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Solution

The fourth proportional to 258,520.64, 387,780.96 and 81,041.36 is: 121,562.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    258,520.64 : 387,780.96 = 81,041.36 : x
  2. Step 2: Convert to fraction form
    258,520.64/387,780.96 = 81,041.36/x
  3. Step 3: Cross multiply
    258,520.64x = 387,780.96 × 81,041.36
  4. Step 4: Simplify right side
    258,520.64x = 31,426,296,380.51
  5. Step 5: Solve for x
    x = 31,426,296,380.51/258,520.64
  6. Step 6: Final answer
    x = 121,562.04

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1.5x scale

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.