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Finding the Fourth Proportional to 81,220.78, 112,050.72 and 63,284.64

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Solution

The fourth proportional to 81,220.78, 112,050.72 and 63,284.64 is: 87,306.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,220.78 : 112,050.72 = 63,284.64 : x
  2. Step 2: Convert to fraction form
    81,220.78/112,050.72 = 63,284.64/x
  3. Step 3: Cross multiply
    81,220.78x = 112,050.72 × 63,284.64
  4. Step 4: Simplify right side
    81,220.78x = 7,091,089,509.05
  5. Step 5: Solve for x
    x = 7,091,089,509.05/81,220.78
  6. Step 6: Final answer
    x = 87,306.35

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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.