Home / 136,420.90-188,262.85-79,064.47

Finding the Fourth Proportional to 136,420.90, 188,262.85 and 79,064.47

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Solution

The fourth proportional to 136,420.90, 188,262.85 and 79,064.47 is: 109,110.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,420.90 : 188,262.85 = 79,064.47 : x
  2. Step 2: Convert to fraction form
    136,420.90/188,262.85 = 79,064.47/x
  3. Step 3: Cross multiply
    136,420.90x = 188,262.85 × 79,064.47
  4. Step 4: Simplify right side
    136,420.90x = 14,884,901,316.96
  5. Step 5: Solve for x
    x = 14,884,901,316.96/136,420.90
  6. Step 6: Final answer
    x = 109,110.12

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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.