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Finding the Fourth Proportional to 156,341.70, 215,750.88 and 84,721.77

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Solution

The fourth proportional to 156,341.70, 215,750.88 and 84,721.77 is: 116,915.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    156,341.70 : 215,750.88 = 84,721.77 : x
  2. Step 2: Convert to fraction form
    156,341.70/215,750.88 = 84,721.77/x
  3. Step 3: Cross multiply
    156,341.70x = 215,750.88 × 84,721.77
  4. Step 4: Simplify right side
    156,341.70x = 18,278,796,432.66
  5. Step 5: Solve for x
    x = 18,278,796,432.66/156,341.70
  6. Step 6: Final answer
    x = 116,915.68

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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.