Home / 287,132.25-430,702.02-100,143.75

Finding the Fourth Proportional to 287,132.25, 430,702.02 and 100,143.75

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Solution

The fourth proportional to 287,132.25, 430,702.02 and 100,143.75 is: 150,216.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    287,132.25 : 430,702.02 = 100,143.75 : x
  2. Step 2: Convert to fraction form
    287,132.25/430,702.02 = 100,143.75/x
  3. Step 3: Cross multiply
    287,132.25x = 430,702.02 × 100,143.75
  4. Step 4: Simplify right side
    287,132.25x = 43,132,115,415.38
  5. Step 5: Solve for x
    x = 43,132,115,415.38/287,132.25
  6. Step 6: Final answer
    x = 150,216.90

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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.