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Finding the Fourth Proportional to 55,018.79, 75,927.75 and 31,144.97

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Solution

The fourth proportional to 55,018.79, 75,927.75 and 31,144.97 is: 42,981.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    55,018.79 : 75,927.75 = 31,144.97 : x
  2. Step 2: Convert to fraction form
    55,018.79/75,927.75 = 31,144.97/x
  3. Step 3: Cross multiply
    55,018.79x = 75,927.75 × 31,144.97
  4. Step 4: Simplify right side
    55,018.79x = 2,364,767,495.92
  5. Step 5: Solve for x
    x = 2,364,767,495.92/55,018.79
  6. Step 6: Final answer
    x = 42,981.09

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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.