Home / 156,748.14-215,820.78-138,332.40

Finding the Fourth Proportional to 156,748.14, 215,820.78 and 138,332.40

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Solution

The fourth proportional to 156,748.14, 215,820.78 and 138,332.40 is: 190,464.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    156,748.14 : 215,820.78 = 138,332.40 : x
  2. Step 2: Convert to fraction form
    156,748.14/215,820.78 = 138,332.40/x
  3. Step 3: Cross multiply
    156,748.14x = 215,820.78 × 138,332.40
  4. Step 4: Simplify right side
    156,748.14x = 29,855,006,467.27
  5. Step 5: Solve for x
    x = 29,855,006,467.27/156,748.14
  6. Step 6: Final answer
    x = 190,464.82

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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.