Home / 129,918.40-194,743.20-70,628.80

Finding the Fourth Proportional to 129,918.40, 194,743.20 and 70,628.80

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Solution

The fourth proportional to 129,918.40, 194,743.20 and 70,628.80 is: 105,870.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,918.40 : 194,743.20 = 70,628.80 : x
  2. Step 2: Convert to fraction form
    129,918.40/194,743.20 = 70,628.80/x
  3. Step 3: Cross multiply
    129,918.40x = 194,743.20 × 70,628.80
  4. Step 4: Simplify right side
    129,918.40x = 13,754,478,524.16
  5. Step 5: Solve for x
    x = 13,754,478,524.16/129,918.40
  6. Step 6: Final answer
    x = 105,870.13

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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.