Home / 287,394.12-431,091.12-87,715.52

Finding the Fourth Proportional to 287,394.12, 431,091.12 and 87,715.52

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Solution

The fourth proportional to 287,394.12, 431,091.12 and 87,715.52 is: 131,573.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    287,394.12 : 431,091.12 = 87,715.52 : x
  2. Step 2: Convert to fraction form
    287,394.12/431,091.12 = 87,715.52/x
  3. Step 3: Cross multiply
    287,394.12x = 431,091.12 × 87,715.52
  4. Step 4: Simplify right side
    287,394.12x = 37,813,381,758.18
  5. Step 5: Solve for x
    x = 37,813,381,758.18/287,394.12
  6. Step 6: Final answer
    x = 131,573.26

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1.5x scale

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.