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Finding the Fourth Proportional to 72,456.40, 108,814.20 and 70,123.60

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Solution

The fourth proportional to 72,456.40, 108,814.20 and 70,123.60 is: 105,310.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,456.40 : 108,814.20 = 70,123.60 : x
  2. Step 2: Convert to fraction form
    72,456.40/108,814.20 = 70,123.60/x
  3. Step 3: Cross multiply
    72,456.40x = 108,814.20 × 70,123.60
  4. Step 4: Simplify right side
    72,456.40x = 7,630,443,435.12
  5. Step 5: Solve for x
    x = 7,630,443,435.12/72,456.40
  6. Step 6: Final answer
    x = 105,310.83

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1.5x scale

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.