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Finding the Fourth Proportional to 139,637.08, 192,703.23 and 75,978.97

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Solution

The fourth proportional to 139,637.08, 192,703.23 and 75,978.97 is: 104,853.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,637.08 : 192,703.23 = 75,978.97 : x
  2. Step 2: Convert to fraction form
    139,637.08/192,703.23 = 75,978.97/x
  3. Step 3: Cross multiply
    139,637.08x = 192,703.23 × 75,978.97
  4. Step 4: Simplify right side
    139,637.08x = 14,641,392,931.07
  5. Step 5: Solve for x
    x = 14,641,392,931.07/139,637.08
  6. Step 6: Final answer
    x = 104,853.19

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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.