Home / 129,669.38-178,946.90-72,308.14

Finding the Fourth Proportional to 129,669.38, 178,946.90 and 72,308.14

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Solution

The fourth proportional to 129,669.38, 178,946.90 and 72,308.14 is: 99,786.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,669.38 : 178,946.90 = 72,308.14 : x
  2. Step 2: Convert to fraction form
    129,669.38/178,946.90 = 72,308.14/x
  3. Step 3: Cross multiply
    129,669.38x = 178,946.90 × 72,308.14
  4. Step 4: Simplify right side
    129,669.38x = 12,939,317,231.17
  5. Step 5: Solve for x
    x = 12,939,317,231.17/129,669.38
  6. Step 6: Final answer
    x = 99,786.99

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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.