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Finding the Fourth Proportional to 55,781.84, 76,979.88 and 30,633.68

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Solution

The fourth proportional to 55,781.84, 76,979.88 and 30,633.68 is: 42,275.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    55,781.84 : 76,979.88 = 30,633.68 : x
  2. Step 2: Convert to fraction form
    55,781.84/76,979.88 = 30,633.68/x
  3. Step 3: Cross multiply
    55,781.84x = 76,979.88 × 30,633.68
  4. Step 4: Simplify right side
    55,781.84x = 2,358,177,010.36
  5. Step 5: Solve for x
    x = 2,358,177,010.36/55,781.84
  6. Step 6: Final answer
    x = 42,275.00

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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.