Home / 123,814.41-170,689.26-87,991.35

Finding the Fourth Proportional to 123,814.41, 170,689.26 and 87,991.35

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Solution

The fourth proportional to 123,814.41, 170,689.26 and 87,991.35 is: 121,303.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,814.41 : 170,689.26 = 87,991.35 : x
  2. Step 2: Convert to fraction form
    123,814.41/170,689.26 = 87,991.35/x
  3. Step 3: Cross multiply
    123,814.41x = 170,689.26 × 87,991.35
  4. Step 4: Simplify right side
    123,814.41x = 15,019,178,417.90
  5. Step 5: Solve for x
    x = 15,019,178,417.90/123,814.41
  6. Step 6: Final answer
    x = 121,303.96

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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.