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Finding the Fourth Proportional to 129,776.40, 194,664.60 and 121,903.20

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Solution

The fourth proportional to 129,776.40, 194,664.60 and 121,903.20 is: 182,854.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,776.40 : 194,664.60 = 121,903.20 : x
  2. Step 2: Convert to fraction form
    129,776.40/194,664.60 = 121,903.20/x
  3. Step 3: Cross multiply
    129,776.40x = 194,664.60 × 121,903.20
  4. Step 4: Simplify right side
    129,776.40x = 23,730,237,666.72
  5. Step 5: Solve for x
    x = 23,730,237,666.72/129,776.40
  6. Step 6: Final answer
    x = 182,854.80

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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.