Home / 123,216.21-170,064.90-77,865.39

Finding the Fourth Proportional to 123,216.21, 170,064.90 and 77,865.39

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Solution

The fourth proportional to 123,216.21, 170,064.90 and 77,865.39 is: 107,471.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,216.21 : 170,064.90 = 77,865.39 : x
  2. Step 2: Convert to fraction form
    123,216.21/170,064.90 = 77,865.39/x
  3. Step 3: Cross multiply
    123,216.21x = 170,064.90 × 77,865.39
  4. Step 4: Simplify right side
    123,216.21x = 13,242,169,763.81
  5. Step 5: Solve for x
    x = 13,242,169,763.81/123,216.21
  6. Step 6: Final answer
    x = 107,471.00

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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.