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Finding the Fourth Proportional to 136,980.35, 189,032.30 and 76,550.97

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Solution

The fourth proportional to 136,980.35, 189,032.30 and 76,550.97 is: 105,640.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,980.35 : 189,032.30 = 76,550.97 : x
  2. Step 2: Convert to fraction form
    136,980.35/189,032.30 = 76,550.97/x
  3. Step 3: Cross multiply
    136,980.35x = 189,032.30 × 76,550.97
  4. Step 4: Simplify right side
    136,980.35x = 14,470,606,539.51
  5. Step 5: Solve for x
    x = 14,470,606,539.51/136,980.35
  6. Step 6: Final answer
    x = 105,640.02

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1.5x scale

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.