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Finding the Fourth Proportional to 145,281.60, 200,485.80 and 81,631.80

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Solution

The fourth proportional to 145,281.60, 200,485.80 and 81,631.80 is: 112,650.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    145,281.60 : 200,485.80 = 81,631.80 : x
  2. Step 2: Convert to fraction form
    145,281.60/200,485.80 = 81,631.80/x
  3. Step 3: Cross multiply
    145,281.60x = 200,485.80 × 81,631.80
  4. Step 4: Simplify right side
    145,281.60x = 16,366,016,728.44
  5. Step 5: Solve for x
    x = 16,366,016,728.44/145,281.60
  6. Step 6: Final answer
    x = 112,650.31

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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.