Home / 287,381.12-431,071.68-87,702.56

Finding the Fourth Proportional to 287,381.12, 431,071.68 and 87,702.56

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Solution

The fourth proportional to 287,381.12, 431,071.68 and 87,702.56 is: 131,553.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    287,381.12 : 431,071.68 = 87,702.56 : x
  2. Step 2: Convert to fraction form
    287,381.12/431,071.68 = 87,702.56/x
  3. Step 3: Cross multiply
    287,381.12x = 431,071.68 × 87,702.56
  4. Step 4: Simplify right side
    287,381.12x = 37,806,089,879.50
  5. Step 5: Solve for x
    x = 37,806,089,879.50/287,381.12
  6. Step 6: Final answer
    x = 131,553.84

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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.