Home / 156,988.70-235,612.65-72,878.30

Finding the Fourth Proportional to 156,988.70, 235,612.65 and 72,878.30

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Solution

The fourth proportional to 156,988.70, 235,612.65 and 72,878.30 is: 109,377.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    156,988.70 : 235,612.65 = 72,878.30 : x
  2. Step 2: Convert to fraction form
    156,988.70/235,612.65 = 72,878.30/x
  3. Step 3: Cross multiply
    156,988.70x = 235,612.65 × 72,878.30
  4. Step 4: Simplify right side
    156,988.70x = 17,171,049,390.50
  5. Step 5: Solve for x
    x = 17,171,049,390.50/156,988.70
  6. Step 6: Final answer
    x = 109,377.61

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.