Home / 129,050.08-178,108.40-78,778.24

Finding the Fourth Proportional to 129,050.08, 178,108.40 and 78,778.24

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Solution

The fourth proportional to 129,050.08, 178,108.40 and 78,778.24 is: 108,725.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,050.08 : 178,108.40 = 78,778.24 : x
  2. Step 2: Convert to fraction form
    129,050.08/178,108.40 = 78,778.24/x
  3. Step 3: Cross multiply
    129,050.08x = 178,108.40 × 78,778.24
  4. Step 4: Simplify right side
    129,050.08x = 14,031,066,281.22
  5. Step 5: Solve for x
    x = 14,031,066,281.22/129,050.08
  6. Step 6: Final answer
    x = 108,725.75

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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.