Home / 135,915.32-187,552.16-78,558.35

Finding the Fourth Proportional to 135,915.32, 187,552.16 and 78,558.35

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Solution

The fourth proportional to 135,915.32, 187,552.16 and 78,558.35 is: 108,404.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    135,915.32 : 187,552.16 = 78,558.35 : x
  2. Step 2: Convert to fraction form
    135,915.32/187,552.16 = 78,558.35/x
  3. Step 3: Cross multiply
    135,915.32x = 187,552.16 × 78,558.35
  4. Step 4: Simplify right side
    135,915.32x = 14,733,787,835.74
  5. Step 5: Solve for x
    x = 14,733,787,835.74/135,915.32
  6. Step 6: Final answer
    x = 108,404.18

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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.