Home / 129,365.90-178,524.68-72,777.32

Finding the Fourth Proportional to 129,365.90, 178,524.68 and 72,777.32

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Solution

The fourth proportional to 129,365.90, 178,524.68 and 72,777.32 is: 100,432.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,365.90 : 178,524.68 = 72,777.32 : x
  2. Step 2: Convert to fraction form
    129,365.90/178,524.68 = 72,777.32/x
  3. Step 3: Cross multiply
    129,365.90x = 178,524.68 × 72,777.32
  4. Step 4: Simplify right side
    129,365.90x = 12,992,547,764.26
  5. Step 5: Solve for x
    x = 12,992,547,764.26/129,365.90
  6. Step 6: Final answer
    x = 100,432.55

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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.