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Finding the Fourth Proportional to 165,726.78, 228,701.79 and 90,275.28

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Solution

The fourth proportional to 165,726.78, 228,701.79 and 90,275.28 is: 124,579.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    165,726.78 : 228,701.79 = 90,275.28 : x
  2. Step 2: Convert to fraction form
    165,726.78/228,701.79 = 90,275.28/x
  3. Step 3: Cross multiply
    165,726.78x = 228,701.79 × 90,275.28
  4. Step 4: Simplify right side
    165,726.78x = 20,646,118,128.75
  5. Step 5: Solve for x
    x = 20,646,118,128.75/165,726.78
  6. Step 6: Final answer
    x = 124,579.25

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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.