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Finding the Fourth Proportional to 55,215, 76,190.63 and 31,341.87

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Solution

The fourth proportional to 55,215, 76,190.63 and 31,341.87 is: 43,248.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    55,215 : 76,190.63 = 31,341.87 : x
  2. Step 2: Convert to fraction form
    55,215/76,190.63 = 31,341.87/x
  3. Step 3: Cross multiply
    55,215x = 76,190.63 × 31,341.87
  4. Step 4: Simplify right side
    55,215x = 2,387,956,663.97
  5. Step 5: Solve for x
    x = 2,387,956,663.97/55,215
  6. Step 6: Final answer
    x = 43,248.33

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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.