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Finding the Fourth Proportional to 87,051.40, 130,620.30 and 49,640.20

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Solution

The fourth proportional to 87,051.40, 130,620.30 and 49,640.20 is: 74,484.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,051.40 : 130,620.30 = 49,640.20 : x
  2. Step 2: Convert to fraction form
    87,051.40/130,620.30 = 49,640.20/x
  3. Step 3: Cross multiply
    87,051.40x = 130,620.30 × 49,640.20
  4. Step 4: Simplify right side
    87,051.40x = 6,484,017,816.06
  5. Step 5: Solve for x
    x = 6,484,017,816.06/87,051.40
  6. Step 6: Final answer
    x = 74,484.93

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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.