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Finding the Fourth Proportional to 165,909.95, 228,955.96 and 90,458.45

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Solution

The fourth proportional to 165,909.95, 228,955.96 and 90,458.45 is: 124,832.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    165,909.95 : 228,955.96 = 90,458.45 : x
  2. Step 2: Convert to fraction form
    165,909.95/228,955.96 = 90,458.45/x
  3. Step 3: Cross multiply
    165,909.95x = 228,955.96 × 90,458.45
  4. Step 4: Simplify right side
    165,909.95x = 20,711,001,259.86
  5. Step 5: Solve for x
    x = 20,711,001,259.86/165,909.95
  6. Step 6: Final answer
    x = 124,832.79

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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.