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Finding the Fourth Proportional to 287,675.40, 431,475.30 and 88,015.80

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Solution

The fourth proportional to 287,675.40, 431,475.30 and 88,015.80 is: 132,012.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    287,675.40 : 431,475.30 = 88,015.80 : x
  2. Step 2: Convert to fraction form
    287,675.40/431,475.30 = 88,015.80/x
  3. Step 3: Cross multiply
    287,675.40x = 431,475.30 × 88,015.80
  4. Step 4: Simplify right side
    287,675.40x = 37,976,643,709.74
  5. Step 5: Solve for x
    x = 37,976,643,709.74/287,675.40
  6. Step 6: Final answer
    x = 132,012.13

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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.