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Finding the Fourth Proportional to 129,866.79, 194,448.30 and 67,406.07

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Solution

The fourth proportional to 129,866.79, 194,448.30 and 67,406.07 is: 100,926.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,866.79 : 194,448.30 = 67,406.07 : x
  2. Step 2: Convert to fraction form
    129,866.79/194,448.30 = 67,406.07/x
  3. Step 3: Cross multiply
    129,866.79x = 194,448.30 × 67,406.07
  4. Step 4: Simplify right side
    129,866.79x = 13,106,996,197.59
  5. Step 5: Solve for x
    x = 13,106,996,197.59/129,866.79
  6. Step 6: Final answer
    x = 100,926.46

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1.5x scale

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.