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Finding the Fourth Proportional to 139,228.58, 192,129.90 and 75,565.28

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Solution

The fourth proportional to 139,228.58, 192,129.90 and 75,565.28 is: 104,277.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,228.58 : 192,129.90 = 75,565.28 : x
  2. Step 2: Convert to fraction form
    139,228.58/192,129.90 = 75,565.28/x
  3. Step 3: Cross multiply
    139,228.58x = 192,129.90 × 75,565.28
  4. Step 4: Simplify right side
    139,228.58x = 14,518,349,689.87
  5. Step 5: Solve for x
    x = 14,518,349,689.87/139,228.58
  6. Step 6: Final answer
    x = 104,277.08

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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.