Home / 258,645.12-387,538.56-90,076.32

Finding the Fourth Proportional to 258,645.12, 387,538.56 and 90,076.32

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Solution

The fourth proportional to 258,645.12, 387,538.56 and 90,076.32 is: 134,965.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    258,645.12 : 387,538.56 = 90,076.32 : x
  2. Step 2: Convert to fraction form
    258,645.12/387,538.56 = 90,076.32/x
  3. Step 3: Cross multiply
    258,645.12x = 387,538.56 × 90,076.32
  4. Step 4: Simplify right side
    258,645.12x = 34,908,047,342.90
  5. Step 5: Solve for x
    x = 34,908,047,342.90/258,645.12
  6. Step 6: Final answer
    x = 134,965.03

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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.