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Finding the Fourth Proportional to 65,471.13, 90,403.43 and 53,373.51

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Solution

The fourth proportional to 65,471.13, 90,403.43 and 53,373.51 is: 73,698.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,471.13 : 90,403.43 = 53,373.51 : x
  2. Step 2: Convert to fraction form
    65,471.13/90,403.43 = 53,373.51/x
  3. Step 3: Cross multiply
    65,471.13x = 90,403.43 × 53,373.51
  4. Step 4: Simplify right side
    65,471.13x = 4,825,148,108.27
  5. Step 5: Solve for x
    x = 4,825,148,108.27/65,471.13
  6. Step 6: Final answer
    x = 73,698.87

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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.