Home / 287,599.19-431,399.90-87,918.80

Finding the Fourth Proportional to 287,599.19, 431,399.90 and 87,918.80

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Solution

The fourth proportional to 287,599.19, 431,399.90 and 87,918.80 is: 131,878.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    287,599.19 : 431,399.90 = 87,918.80 : x
  2. Step 2: Convert to fraction form
    287,599.19/431,399.90 = 87,918.80/x
  3. Step 3: Cross multiply
    287,599.19x = 431,399.90 × 87,918.80
  4. Step 4: Simplify right side
    287,599.19x = 37,928,161,528.12
  5. Step 5: Solve for x
    x = 37,928,161,528.12/287,599.19
  6. Step 6: Final answer
    x = 131,878.54

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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.