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Finding the Fourth Proportional to 213,878.72, 320,637.62 and 134,818.68

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Solution

The fourth proportional to 213,878.72, 320,637.62 and 134,818.68 is: 202,114.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    213,878.72 : 320,637.62 = 134,818.68 : x
  2. Step 2: Convert to fraction form
    213,878.72/320,637.62 = 134,818.68/x
  3. Step 3: Cross multiply
    213,878.72x = 320,637.62 × 134,818.68
  4. Step 4: Simplify right side
    213,878.72x = 43,227,940,686.74
  5. Step 5: Solve for x
    x = 43,227,940,686.74/213,878.72
  6. Step 6: Final answer
    x = 202,114.27

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1.5x scale

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.