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Finding the Fourth Proportional to 86,003.53, 128,937.71 and 54,347.01

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Solution

The fourth proportional to 86,003.53, 128,937.71 and 54,347.01 is: 81,477.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,003.53 : 128,937.71 = 54,347.01 : x
  2. Step 2: Convert to fraction form
    86,003.53/128,937.71 = 54,347.01/x
  3. Step 3: Cross multiply
    86,003.53x = 128,937.71 × 54,347.01
  4. Step 4: Simplify right side
    86,003.53x = 7,007,378,361.40
  5. Step 5: Solve for x
    x = 7,007,378,361.40/86,003.53
  6. Step 6: Final answer
    x = 81,477.80

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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.