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Finding the Fourth Proportional to 156,315.68, 215,714.89 and 84,695.68

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Solution

The fourth proportional to 156,315.68, 215,714.89 and 84,695.68 is: 116,879.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    156,315.68 : 215,714.89 = 84,695.68 : x
  2. Step 2: Convert to fraction form
    156,315.68/215,714.89 = 84,695.68/x
  3. Step 3: Cross multiply
    156,315.68x = 215,714.89 × 84,695.68
  4. Step 4: Simplify right side
    156,315.68x = 18,270,118,543.65
  5. Step 5: Solve for x
    x = 18,270,118,543.65/156,315.68
  6. Step 6: Final answer
    x = 116,879.63

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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.