Home / 285,537.15-428,141.70-85,827.60

Finding the Fourth Proportional to 285,537.15, 428,141.70 and 85,827.60

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Solution

The fourth proportional to 285,537.15, 428,141.70 and 85,827.60 is: 128,692.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    285,537.15 : 428,141.70 = 85,827.60 : x
  2. Step 2: Convert to fraction form
    285,537.15/428,141.70 = 85,827.60/x
  3. Step 3: Cross multiply
    285,537.15x = 428,141.70 × 85,827.60
  4. Step 4: Simplify right side
    285,537.15x = 36,746,374,570.92
  5. Step 5: Solve for x
    x = 36,746,374,570.92/285,537.15
  6. Step 6: Final answer
    x = 128,692.10

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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.