Home / 87,439.47-120,686.61-51,157.74

Finding the Fourth Proportional to 87,439.47, 120,686.61 and 51,157.74

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Solution

The fourth proportional to 87,439.47, 120,686.61 and 51,157.74 is: 70,609.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,439.47 : 120,686.61 = 51,157.74 : x
  2. Step 2: Convert to fraction form
    87,439.47/120,686.61 = 51,157.74/x
  3. Step 3: Cross multiply
    87,439.47x = 120,686.61 × 51,157.74
  4. Step 4: Simplify right side
    87,439.47x = 6,174,054,215.86
  5. Step 5: Solve for x
    x = 6,174,054,215.86/87,439.47
  6. Step 6: Final answer
    x = 70,609.47

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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.