Home / 135,577.40-187,110-78,985.13

Finding the Fourth Proportional to 135,577.40, 187,110 and 78,985.13

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Solution

The fourth proportional to 135,577.40, 187,110 and 78,985.13 is: 109,007.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    135,577.40 : 187,110 = 78,985.13 : x
  2. Step 2: Convert to fraction form
    135,577.40/187,110 = 78,985.13/x
  3. Step 3: Cross multiply
    135,577.40x = 187,110 × 78,985.13
  4. Step 4: Simplify right side
    135,577.40x = 14,778,906,738.75
  5. Step 5: Solve for x
    x = 14,778,906,738.75/135,577.40
  6. Step 6: Final answer
    x = 109,007.16

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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.