Home / 287,673.12-431,440.37-87,995.23

Finding the Fourth Proportional to 287,673.12, 431,440.37 and 87,995.23

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Solution

The fourth proportional to 287,673.12, 431,440.37 and 87,995.23 is: 131,971.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    287,673.12 : 431,440.37 = 87,995.23 : x
  2. Step 2: Convert to fraction form
    287,673.12/431,440.37 = 87,995.23/x
  3. Step 3: Cross multiply
    287,673.12x = 431,440.37 × 87,995.23
  4. Step 4: Simplify right side
    287,673.12x = 37,964,694,149.46
  5. Step 5: Solve for x
    x = 37,964,694,149.46/287,673.12
  6. Step 6: Final answer
    x = 131,971.64

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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.