Home / 136,840.50-188,838.05-76,412.18

Finding the Fourth Proportional to 136,840.50, 188,838.05 and 76,412.18

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Solution

The fourth proportional to 136,840.50, 188,838.05 and 76,412.18 is: 105,447.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,840.50 : 188,838.05 = 76,412.18 : x
  2. Step 2: Convert to fraction form
    136,840.50/188,838.05 = 76,412.18/x
  3. Step 3: Cross multiply
    136,840.50x = 188,838.05 × 76,412.18
  4. Step 4: Simplify right side
    136,840.50x = 14,429,525,741.20
  5. Step 5: Solve for x
    x = 14,429,525,741.20/136,840.50
  6. Step 6: Final answer
    x = 105,447.77

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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.