Home / 136,724.64-188,651.79-78,570.11

Finding the Fourth Proportional to 136,724.64, 188,651.79 and 78,570.11

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Solution

The fourth proportional to 136,724.64, 188,651.79 and 78,570.11 is: 108,410.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,724.64 : 188,651.79 = 78,570.11 : x
  2. Step 2: Convert to fraction form
    136,724.64/188,651.79 = 78,570.11/x
  3. Step 3: Cross multiply
    136,724.64x = 188,651.79 × 78,570.11
  4. Step 4: Simplify right side
    136,724.64x = 14,822,390,948.74
  5. Step 5: Solve for x
    x = 14,822,390,948.74/136,724.64
  6. Step 6: Final answer
    x = 108,410.53

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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.