Home / 87,056.78-130,738.32-85,810.19

Finding the Fourth Proportional to 87,056.78, 130,738.32 and 85,810.19

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Solution

The fourth proportional to 87,056.78, 130,738.32 and 85,810.19 is: 128,866.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,056.78 : 130,738.32 = 85,810.19 : x
  2. Step 2: Convert to fraction form
    87,056.78/130,738.32 = 85,810.19/x
  3. Step 3: Cross multiply
    87,056.78x = 130,738.32 × 85,810.19
  4. Step 4: Simplify right side
    87,056.78x = 11,218,679,425.79
  5. Step 5: Solve for x
    x = 11,218,679,425.79/87,056.78
  6. Step 6: Final answer
    x = 128,866.24

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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.