Home / 287,640.20-431,460.30-130,176.20

Finding the Fourth Proportional to 287,640.20, 431,460.30 and 130,176.20

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Solution

The fourth proportional to 287,640.20, 431,460.30 and 130,176.20 is: 195,264.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    287,640.20 : 431,460.30 = 130,176.20 : x
  2. Step 2: Convert to fraction form
    287,640.20/431,460.30 = 130,176.20/x
  3. Step 3: Cross multiply
    287,640.20x = 431,460.30 × 130,176.20
  4. Step 4: Simplify right side
    287,640.20x = 56,165,862,304.86
  5. Step 5: Solve for x
    x = 56,165,862,304.86/287,640.20
  6. Step 6: Final answer
    x = 195,264.30

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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.