Home / 81,430.40-122,284.32-53,015.75

Finding the Fourth Proportional to 81,430.40, 122,284.32 and 53,015.75

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Solution

The fourth proportional to 81,430.40, 122,284.32 and 53,015.75 is: 79,613.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,430.40 : 122,284.32 = 53,015.75 : x
  2. Step 2: Convert to fraction form
    81,430.40/122,284.32 = 53,015.75/x
  3. Step 3: Cross multiply
    81,430.40x = 122,284.32 × 53,015.75
  4. Step 4: Simplify right side
    81,430.40x = 6,482,994,326.62
  5. Step 5: Solve for x
    x = 6,482,994,326.62/81,430.40
  6. Step 6: Final answer
    x = 79,613.94

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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.