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Finding the Fourth Proportional to 58,479.16, 80,701.28 and 31,621.68

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Solution

The fourth proportional to 58,479.16, 80,701.28 and 31,621.68 is: 43,637.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    58,479.16 : 80,701.28 = 31,621.68 : x
  2. Step 2: Convert to fraction form
    58,479.16/80,701.28 = 31,621.68/x
  3. Step 3: Cross multiply
    58,479.16x = 80,701.28 × 31,621.68
  4. Step 4: Simplify right side
    58,479.16x = 2,551,910,130.80
  5. Step 5: Solve for x
    x = 2,551,910,130.80/58,479.16
  6. Step 6: Final answer
    x = 43,637.94

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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.