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Finding the Fourth Proportional to 287,709.90, 431,549.26 and 88,030.32

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Solution

The fourth proportional to 287,709.90, 431,549.26 and 88,030.32 is: 132,040.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    287,709.90 : 431,549.26 = 88,030.32 : x
  2. Step 2: Convert to fraction form
    287,709.90/431,549.26 = 88,030.32/x
  3. Step 3: Cross multiply
    287,709.90x = 431,549.26 × 88,030.32
  4. Step 4: Simplify right side
    287,709.90x = 37,989,419,453.56
  5. Step 5: Solve for x
    x = 37,989,419,453.56/287,709.90
  6. Step 6: Final answer
    x = 132,040.71

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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.