Home / 129,110.32-178,188.95-72,521.68

Finding the Fourth Proportional to 129,110.32, 178,188.95 and 72,521.68

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Solution

The fourth proportional to 129,110.32, 178,188.95 and 72,521.68 is: 100,089.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,110.32 : 178,188.95 = 72,521.68 : x
  2. Step 2: Convert to fraction form
    129,110.32/178,188.95 = 72,521.68/x
  3. Step 3: Cross multiply
    129,110.32x = 178,188.95 × 72,521.68
  4. Step 4: Simplify right side
    129,110.32x = 12,922,562,011.44
  5. Step 5: Solve for x
    x = 12,922,562,011.44/129,110.32
  6. Step 6: Final answer
    x = 100,089.30

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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.