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Finding the Fourth Proportional to 128,539.37, 192,848.43 and 57,521.77

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Solution

The fourth proportional to 128,539.37, 192,848.43 and 57,521.77 is: 86,300.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,539.37 : 192,848.43 = 57,521.77 : x
  2. Step 2: Convert to fraction form
    128,539.37/192,848.43 = 57,521.77/x
  3. Step 3: Cross multiply
    128,539.37x = 192,848.43 × 57,521.77
  4. Step 4: Simplify right side
    128,539.37x = 11,092,983,035.32
  5. Step 5: Solve for x
    x = 11,092,983,035.32/128,539.37
  6. Step 6: Final answer
    x = 86,300.28

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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.