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Finding the Fourth Proportional to 103,992.13, 143,509.11 and 56,245.47

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Solution

The fourth proportional to 103,992.13, 143,509.11 and 56,245.47 is: 77,618.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,992.13 : 143,509.11 = 56,245.47 : x
  2. Step 2: Convert to fraction form
    103,992.13/143,509.11 = 56,245.47/x
  3. Step 3: Cross multiply
    103,992.13x = 143,509.11 × 56,245.47
  4. Step 4: Simplify right side
    103,992.13x = 8,071,737,341.23
  5. Step 5: Solve for x
    x = 8,071,737,341.23/103,992.13
  6. Step 6: Final answer
    x = 77,618.73

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1.5x scale

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.