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Finding the Fourth Proportional to 324,648.77, 486,973.16 and 87,991.45

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Solution

The fourth proportional to 324,648.77, 486,973.16 and 87,991.45 is: 131,987.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    324,648.77 : 486,973.16 = 87,991.45 : x
  2. Step 2: Convert to fraction form
    324,648.77/486,973.16 = 87,991.45/x
  3. Step 3: Cross multiply
    324,648.77x = 486,973.16 × 87,991.45
  4. Step 4: Simplify right side
    324,648.77x = 42,849,472,884.58
  5. Step 5: Solve for x
    x = 42,849,472,884.58/324,648.77
  6. Step 6: Final answer
    x = 131,987.17

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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.