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Finding the Fourth Proportional to 58,465.60, 87,640.80 and 28,859.20

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Solution

The fourth proportional to 58,465.60, 87,640.80 and 28,859.20 is: 43,260.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    58,465.60 : 87,640.80 = 28,859.20 : x
  2. Step 2: Convert to fraction form
    58,465.60/87,640.80 = 28,859.20/x
  3. Step 3: Cross multiply
    58,465.60x = 87,640.80 × 28,859.20
  4. Step 4: Simplify right side
    58,465.60x = 2,529,243,375.36
  5. Step 5: Solve for x
    x = 2,529,243,375.36/58,465.60
  6. Step 6: Final answer
    x = 43,260.37

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.