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Finding the Fourth Proportional to 81,303.40, 112,188.90 and 45,490.60

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Solution

The fourth proportional to 81,303.40, 112,188.90 and 45,490.60 is: 62,771.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,303.40 : 112,188.90 = 45,490.60 : x
  2. Step 2: Convert to fraction form
    81,303.40/112,188.90 = 45,490.60/x
  3. Step 3: Cross multiply
    81,303.40x = 112,188.90 × 45,490.60
  4. Step 4: Simplify right side
    81,303.40x = 5,103,540,374.34
  5. Step 5: Solve for x
    x = 5,103,540,374.34/81,303.40
  6. Step 6: Final answer
    x = 62,771.55

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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.