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Finding the Fourth Proportional to 159,426.25, 220,018.21 and 87,806.25

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Solution

The fourth proportional to 159,426.25, 220,018.21 and 87,806.25 is: 121,178.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    159,426.25 : 220,018.21 = 87,806.25 : x
  2. Step 2: Convert to fraction form
    159,426.25/220,018.21 = 87,806.25/x
  3. Step 3: Cross multiply
    159,426.25x = 220,018.21 × 87,806.25
  4. Step 4: Simplify right side
    159,426.25x = 19,318,973,512.78
  5. Step 5: Solve for x
    x = 19,318,973,512.78/159,426.25
  6. Step 6: Final answer
    x = 121,178.13

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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.