Home / 287,387.19-431,080.79-87,708.62

Finding the Fourth Proportional to 287,387.19, 431,080.79 and 87,708.62

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Solution

The fourth proportional to 287,387.19, 431,080.79 and 87,708.62 is: 131,562.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    287,387.19 : 431,080.79 = 87,708.62 : x
  2. Step 2: Convert to fraction form
    287,387.19/431,080.79 = 87,708.62/x
  3. Step 3: Cross multiply
    287,387.19x = 431,080.79 × 87,708.62
  4. Step 4: Simplify right side
    287,387.19x = 37,809,501,838.57
  5. Step 5: Solve for x
    x = 37,809,501,838.57/287,387.19
  6. Step 6: Final answer
    x = 131,562.93

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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.