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Finding the Fourth Proportional to 136,960.50, 189,014.28 and 76,531.32

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Solution

The fourth proportional to 136,960.50, 189,014.28 and 76,531.32 is: 105,618.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,960.50 : 189,014.28 = 76,531.32 : x
  2. Step 2: Convert to fraction form
    136,960.50/189,014.28 = 76,531.32/x
  3. Step 3: Cross multiply
    136,960.50x = 189,014.28 × 76,531.32
  4. Step 4: Simplify right side
    136,960.50x = 14,465,512,347.25
  5. Step 5: Solve for x
    x = 14,465,512,347.25/136,960.50
  6. Step 6: Final answer
    x = 105,618.13

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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.