Home / 287,733.80-431,730.30-137,916.20

Finding the Fourth Proportional to 287,733.80, 431,730.30 and 137,916.20

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Solution

The fourth proportional to 287,733.80, 431,730.30 and 137,916.20 is: 206,936.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    287,733.80 : 431,730.30 = 137,916.20 : x
  2. Step 2: Convert to fraction form
    287,733.80/431,730.30 = 137,916.20/x
  3. Step 3: Cross multiply
    287,733.80x = 431,730.30 × 137,916.20
  4. Step 4: Simplify right side
    287,733.80x = 59,542,602,400.86
  5. Step 5: Solve for x
    x = 59,542,602,400.86/287,733.80
  6. Step 6: Final answer
    x = 206,936.42

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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.