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Finding the Fourth Proportional to 163,434.80, 225,526.20 and 91,809.20

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Solution

The fourth proportional to 163,434.80, 225,526.20 and 91,809.20 is: 126,688.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    163,434.80 : 225,526.20 = 91,809.20 : x
  2. Step 2: Convert to fraction form
    163,434.80/225,526.20 = 91,809.20/x
  3. Step 3: Cross multiply
    163,434.80x = 225,526.20 × 91,809.20
  4. Step 4: Simplify right side
    163,434.80x = 20,705,380,001.04
  5. Step 5: Solve for x
    x = 20,705,380,001.04/163,434.80
  6. Step 6: Final answer
    x = 126,688.93

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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.