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Finding the Fourth Proportional to 99,216, 136,879.08 and 56,751.84

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Solution

The fourth proportional to 99,216, 136,879.08 and 56,751.84 is: 78,295.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,216 : 136,879.08 = 56,751.84 : x
  2. Step 2: Convert to fraction form
    99,216/136,879.08 = 56,751.84/x
  3. Step 3: Cross multiply
    99,216x = 136,879.08 × 56,751.84
  4. Step 4: Simplify right side
    99,216x = 7,768,139,647.51
  5. Step 5: Solve for x
    x = 7,768,139,647.51/99,216
  6. Step 6: Final answer
    x = 78,295.23

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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.