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Finding the Fourth Proportional to 128,535.20, 192,802.80 and 58,551.20

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Solution

The fourth proportional to 128,535.20, 192,802.80 and 58,551.20 is: 87,826.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,535.20 : 192,802.80 = 58,551.20 : x
  2. Step 2: Convert to fraction form
    128,535.20/192,802.80 = 58,551.20/x
  3. Step 3: Cross multiply
    128,535.20x = 192,802.80 × 58,551.20
  4. Step 4: Simplify right side
    128,535.20x = 11,288,835,303.36
  5. Step 5: Solve for x
    x = 11,288,835,303.36/128,535.20
  6. Step 6: Final answer
    x = 87,826.80

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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.