Home / 287,667.09-431,500.50-87,987.51

Finding the Fourth Proportional to 287,667.09, 431,500.50 and 87,987.51

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Solution

The fourth proportional to 287,667.09, 431,500.50 and 87,987.51 is: 131,981.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    287,667.09 : 431,500.50 = 87,987.51 : x
  2. Step 2: Convert to fraction form
    287,667.09/431,500.50 = 87,987.51/x
  3. Step 3: Cross multiply
    287,667.09x = 431,500.50 × 87,987.51
  4. Step 4: Simplify right side
    287,667.09x = 37,966,654,558.76
  5. Step 5: Solve for x
    x = 37,966,654,558.76/287,667.09
  6. Step 6: Final answer
    x = 131,981.22

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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.