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Finding the Fourth Proportional to 85,431, 117,894.28 and 47,705.28

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Solution

The fourth proportional to 85,431, 117,894.28 and 47,705.28 is: 65,833.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,431 : 117,894.28 = 47,705.28 : x
  2. Step 2: Convert to fraction form
    85,431/117,894.28 = 47,705.28/x
  3. Step 3: Cross multiply
    85,431x = 117,894.28 × 47,705.28
  4. Step 4: Simplify right side
    85,431x = 5,624,179,637.80
  5. Step 5: Solve for x
    x = 5,624,179,637.80/85,431
  6. Step 6: Final answer
    x = 65,833.01

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.