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Finding the Fourth Proportional to 54,235.40, 81,353.10 and 53,457.80

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Solution

The fourth proportional to 54,235.40, 81,353.10 and 53,457.80 is: 80,186.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    54,235.40 : 81,353.10 = 53,457.80 : x
  2. Step 2: Convert to fraction form
    54,235.40/81,353.10 = 53,457.80/x
  3. Step 3: Cross multiply
    54,235.40x = 81,353.10 × 53,457.80
  4. Step 4: Simplify right side
    54,235.40x = 4,348,957,749.18
  5. Step 5: Solve for x
    x = 4,348,957,749.18/54,235.40
  6. Step 6: Final answer
    x = 80,186.70

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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.