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Finding the Fourth Proportional to 81,041.70, 111,888.88 and 55,590.68

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Solution

The fourth proportional to 81,041.70, 111,888.88 and 55,590.68 is: 76,750.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,041.70 : 111,888.88 = 55,590.68 : x
  2. Step 2: Convert to fraction form
    81,041.70/111,888.88 = 55,590.68/x
  3. Step 3: Cross multiply
    81,041.70x = 111,888.88 × 55,590.68
  4. Step 4: Simplify right side
    81,041.70x = 6,219,978,923.64
  5. Step 5: Solve for x
    x = 6,219,978,923.64/81,041.70
  6. Step 6: Final answer
    x = 76,750.35

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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.