Home / 129,022.08-178,069.76-78,750.24

Finding the Fourth Proportional to 129,022.08, 178,069.76 and 78,750.24

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Solution

The fourth proportional to 129,022.08, 178,069.76 and 78,750.24 is: 108,687.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,022.08 : 178,069.76 = 78,750.24 : x
  2. Step 2: Convert to fraction form
    129,022.08/178,069.76 = 78,750.24/x
  3. Step 3: Cross multiply
    129,022.08x = 178,069.76 × 78,750.24
  4. Step 4: Simplify right side
    129,022.08x = 14,023,036,336.74
  5. Step 5: Solve for x
    x = 14,023,036,336.74/129,022.08
  6. Step 6: Final answer
    x = 108,687.10

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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.