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Finding the Fourth Proportional to 87,010.60, 130,710.30 and 83,705.80

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Solution

The fourth proportional to 87,010.60, 130,710.30 and 83,705.80 is: 125,745.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,010.60 : 130,710.30 = 83,705.80 : x
  2. Step 2: Convert to fraction form
    87,010.60/130,710.30 = 83,705.80/x
  3. Step 3: Cross multiply
    87,010.60x = 130,710.30 × 83,705.80
  4. Step 4: Simplify right side
    87,010.60x = 10,941,210,229.74
  5. Step 5: Solve for x
    x = 10,941,210,229.74/87,010.60
  6. Step 6: Final answer
    x = 125,745.72

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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.