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Finding the Fourth Proportional to 139,117.80, 208,727.90 and 56,020.20

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Solution

The fourth proportional to 139,117.80, 208,727.90 and 56,020.20 is: 84,050.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,117.80 : 208,727.90 = 56,020.20 : x
  2. Step 2: Convert to fraction form
    139,117.80/208,727.90 = 56,020.20/x
  3. Step 3: Cross multiply
    139,117.80x = 208,727.90 × 56,020.20
  4. Step 4: Simplify right side
    139,117.80x = 11,692,978,703.58
  5. Step 5: Solve for x
    x = 11,692,978,703.58/139,117.80
  6. Step 6: Final answer
    x = 84,050.92

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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.