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Finding the Fourth Proportional to 103,992.35, 143,509.55 and 56,245.77

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Solution

The fourth proportional to 103,992.35, 143,509.55 and 56,245.77 is: 77,619.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,992.35 : 143,509.55 = 56,245.77 : x
  2. Step 2: Convert to fraction form
    103,992.35/143,509.55 = 56,245.77/x
  3. Step 3: Cross multiply
    103,992.35x = 143,509.55 × 56,245.77
  4. Step 4: Simplify right side
    103,992.35x = 8,071,804,860.87
  5. Step 5: Solve for x
    x = 8,071,804,860.87/103,992.35
  6. Step 6: Final answer
    x = 77,619.22

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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.