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Finding the Fourth Proportional to 76,663.32, 114,994.89 and 21,259.32

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Solution

The fourth proportional to 76,663.32, 114,994.89 and 21,259.32 is: 31,888.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    76,663.32 : 114,994.89 = 21,259.32 : x
  2. Step 2: Convert to fraction form
    76,663.32/114,994.89 = 21,259.32/x
  3. Step 3: Cross multiply
    76,663.32x = 114,994.89 × 21,259.32
  4. Step 4: Simplify right side
    76,663.32x = 2,444,713,164.87
  5. Step 5: Solve for x
    x = 2,444,713,164.87/76,663.32
  6. Step 6: Final answer
    x = 31,888.96

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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.