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Finding the Fourth Proportional to 165,859.36, 228,885.72 and 90,407.84

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Solution

The fourth proportional to 165,859.36, 228,885.72 and 90,407.84 is: 124,762.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    165,859.36 : 228,885.72 = 90,407.84 : x
  2. Step 2: Convert to fraction form
    165,859.36/228,885.72 = 90,407.84/x
  3. Step 3: Cross multiply
    165,859.36x = 228,885.72 × 90,407.84
  4. Step 4: Simplify right side
    165,859.36x = 20,693,063,552.04
  5. Step 5: Solve for x
    x = 20,693,063,552.04/165,859.36
  6. Step 6: Final answer
    x = 124,762.71

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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.