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Finding the Fourth Proportional to 58,718.39, 80,919.51 and 57,638.76

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Solution

The fourth proportional to 58,718.39, 80,919.51 and 57,638.76 is: 79,431.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    58,718.39 : 80,919.51 = 57,638.76 : x
  2. Step 2: Convert to fraction form
    58,718.39/80,919.51 = 57,638.76/x
  3. Step 3: Cross multiply
    58,718.39x = 80,919.51 × 57,638.76
  4. Step 4: Simplify right side
    58,718.39x = 4,664,100,216.21
  5. Step 5: Solve for x
    x = 4,664,100,216.21/58,718.39
  6. Step 6: Final answer
    x = 79,431.68

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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.