Home / 136,972.49-189,021.58-76,543.12

Finding the Fourth Proportional to 136,972.49, 189,021.58 and 76,543.12

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Solution

The fourth proportional to 136,972.49, 189,021.58 and 76,543.12 is: 105,629.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,972.49 : 189,021.58 = 76,543.12 : x
  2. Step 2: Convert to fraction form
    136,972.49/189,021.58 = 76,543.12/x
  3. Step 3: Cross multiply
    136,972.49x = 189,021.58 × 76,543.12
  4. Step 4: Simplify right side
    136,972.49x = 14,468,301,525.45
  5. Step 5: Solve for x
    x = 14,468,301,525.45/136,972.49
  6. Step 6: Final answer
    x = 105,629.25

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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.