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Finding the Fourth Proportional to 58,578.77, 80,838.59 and 31,721.20

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Solution

The fourth proportional to 58,578.77, 80,838.59 and 31,721.20 is: 43,775.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    58,578.77 : 80,838.59 = 31,721.20 : x
  2. Step 2: Convert to fraction form
    58,578.77/80,838.59 = 31,721.20/x
  3. Step 3: Cross multiply
    58,578.77x = 80,838.59 × 31,721.20
  4. Step 4: Simplify right side
    58,578.77x = 2,564,296,898.84
  5. Step 5: Solve for x
    x = 2,564,296,898.84/58,578.77
  6. Step 6: Final answer
    x = 43,775.19

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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.