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Finding the Fourth Proportional to 136,959.50, 189,012.90 and 76,530.32

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Solution

The fourth proportional to 136,959.50, 189,012.90 and 76,530.32 is: 105,616.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,959.50 : 189,012.90 = 76,530.32 : x
  2. Step 2: Convert to fraction form
    136,959.50/189,012.90 = 76,530.32/x
  3. Step 3: Cross multiply
    136,959.50x = 189,012.90 × 76,530.32
  4. Step 4: Simplify right side
    136,959.50x = 14,465,217,721.13
  5. Step 5: Solve for x
    x = 14,465,217,721.13/136,959.50
  6. Step 6: Final answer
    x = 105,616.75

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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.