Home / 136,307.66-188,122.25-78,187.11

Finding the Fourth Proportional to 136,307.66, 188,122.25 and 78,187.11

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Solution

The fourth proportional to 136,307.66, 188,122.25 and 78,187.11 is: 107,908.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,307.66 : 188,122.25 = 78,187.11 : x
  2. Step 2: Convert to fraction form
    136,307.66/188,122.25 = 78,187.11/x
  3. Step 3: Cross multiply
    136,307.66x = 188,122.25 × 78,187.11
  4. Step 4: Simplify right side
    136,307.66x = 14,708,734,663.26
  5. Step 5: Solve for x
    x = 14,708,734,663.26/136,307.66
  6. Step 6: Final answer
    x = 107,908.35

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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.