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Finding the Fourth Proportional to 228,717.51, 315,646.79 and 138,095.52

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Solution

The fourth proportional to 228,717.51, 315,646.79 and 138,095.52 is: 190,581.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    228,717.51 : 315,646.79 = 138,095.52 : x
  2. Step 2: Convert to fraction form
    228,717.51/315,646.79 = 138,095.52/x
  3. Step 3: Cross multiply
    228,717.51x = 315,646.79 × 138,095.52
  4. Step 4: Simplify right side
    228,717.51x = 43,589,406,910.90
  5. Step 5: Solve for x
    x = 43,589,406,910.90/228,717.51
  6. Step 6: Final answer
    x = 190,581.85

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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.