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Finding the Fourth Proportional to 86,663.24, 129,994.86 and 31,259.24

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Solution

The fourth proportional to 86,663.24, 129,994.86 and 31,259.24 is: 46,888.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,663.24 : 129,994.86 = 31,259.24 : x
  2. Step 2: Convert to fraction form
    86,663.24/129,994.86 = 31,259.24/x
  3. Step 3: Cross multiply
    86,663.24x = 129,994.86 × 31,259.24
  4. Step 4: Simplify right side
    86,663.24x = 4,063,540,527.51
  5. Step 5: Solve for x
    x = 4,063,540,527.51/86,663.24
  6. Step 6: Final answer
    x = 46,888.86

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Similar ratio
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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.