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Finding the Fourth Proportional to 128,479, 192,637.50 and 61,935.88

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Solution

The fourth proportional to 128,479, 192,637.50 and 61,935.88 is: 92,864.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,479 : 192,637.50 = 61,935.88 : x
  2. Step 2: Convert to fraction form
    128,479/192,637.50 = 61,935.88/x
  3. Step 3: Cross multiply
    128,479x = 192,637.50 × 61,935.88
  4. Step 4: Simplify right side
    128,479x = 11,931,173,083.50
  5. Step 5: Solve for x
    x = 11,931,173,083.50/128,479
  6. Step 6: Final answer
    x = 92,864.77

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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.