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Finding the Fourth Proportional to 81,026.40, 121,538.80 and 25,622.40

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Solution

The fourth proportional to 81,026.40, 121,538.80 and 25,622.40 is: 38,433.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,026.40 : 121,538.80 = 25,622.40 : x
  2. Step 2: Convert to fraction form
    81,026.40/121,538.80 = 25,622.40/x
  3. Step 3: Cross multiply
    81,026.40x = 121,538.80 × 25,622.40
  4. Step 4: Simplify right side
    81,026.40x = 3,114,115,749.12
  5. Step 5: Solve for x
    x = 3,114,115,749.12/81,026.40
  6. Step 6: Final answer
    x = 38,433.35

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.