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Finding the Fourth Proportional to 126,063.60, 189,095.40 and 79,407.60

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Solution

The fourth proportional to 126,063.60, 189,095.40 and 79,407.60 is: 119,111.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    126,063.60 : 189,095.40 = 79,407.60 : x
  2. Step 2: Convert to fraction form
    126,063.60/189,095.40 = 79,407.60/x
  3. Step 3: Cross multiply
    126,063.60x = 189,095.40 × 79,407.60
  4. Step 4: Simplify right side
    126,063.60x = 15,015,611,885.04
  5. Step 5: Solve for x
    x = 15,015,611,885.04/126,063.60
  6. Step 6: Final answer
    x = 119,111.40

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.