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Finding the Fourth Proportional to 86,487.86, 129,637.01 and 33,839.48

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Solution

The fourth proportional to 86,487.86, 129,637.01 and 33,839.48 is: 50,722.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,487.86 : 129,637.01 = 33,839.48 : x
  2. Step 2: Convert to fraction form
    86,487.86/129,637.01 = 33,839.48/x
  3. Step 3: Cross multiply
    86,487.86x = 129,637.01 × 33,839.48
  4. Step 4: Simplify right side
    86,487.86x = 4,386,848,189.77
  5. Step 5: Solve for x
    x = 4,386,848,189.77/86,487.86
  6. Step 6: Final answer
    x = 50,722.13

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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.