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Finding the Fourth Proportional to 87,473.40, 130,991.40 and 57,730.20

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Solution

The fourth proportional to 87,473.40, 130,991.40 and 57,730.20 is: 86,450.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,473.40 : 130,991.40 = 57,730.20 : x
  2. Step 2: Convert to fraction form
    87,473.40/130,991.40 = 57,730.20/x
  3. Step 3: Cross multiply
    87,473.40x = 130,991.40 × 57,730.20
  4. Step 4: Simplify right side
    87,473.40x = 7,562,159,720.28
  5. Step 5: Solve for x
    x = 7,562,159,720.28/87,473.40
  6. Step 6: Final answer
    x = 86,450.96

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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.