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Finding the Fourth Proportional to 55,629, 76,768.02 and 30,479.08

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Solution

The fourth proportional to 55,629, 76,768.02 and 30,479.08 is: 42,061.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    55,629 : 76,768.02 = 30,479.08 : x
  2. Step 2: Convert to fraction form
    55,629/76,768.02 = 30,479.08/x
  3. Step 3: Cross multiply
    55,629x = 76,768.02 × 30,479.08
  4. Step 4: Simplify right side
    55,629x = 2,339,818,623.02
  5. Step 5: Solve for x
    x = 2,339,818,623.02/55,629
  6. Step 6: Final answer
    x = 42,061.13

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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.