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Finding the Fourth Proportional to 221,341.60, 331,810.80 and 81,066.40

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Solution

The fourth proportional to 221,341.60, 331,810.80 and 81,066.40 is: 121,525.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    221,341.60 : 331,810.80 = 81,066.40 : x
  2. Step 2: Convert to fraction form
    221,341.60/331,810.80 = 81,066.40/x
  3. Step 3: Cross multiply
    221,341.60x = 331,810.80 × 81,066.40
  4. Step 4: Simplify right side
    221,341.60x = 26,898,707,037.12
  5. Step 5: Solve for x
    x = 26,898,707,037.12/221,341.60
  6. Step 6: Final answer
    x = 121,525.76

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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.