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Finding the Fourth Proportional to 72,421.70, 108,596.10 and 42,848.60

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Solution

The fourth proportional to 72,421.70, 108,596.10 and 42,848.60 is: 64,251.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,421.70 : 108,596.10 = 42,848.60 : x
  2. Step 2: Convert to fraction form
    72,421.70/108,596.10 = 42,848.60/x
  3. Step 3: Cross multiply
    72,421.70x = 108,596.10 × 42,848.60
  4. Step 4: Simplify right side
    72,421.70x = 4,653,190,850.46
  5. Step 5: Solve for x
    x = 4,653,190,850.46/72,421.70
  6. Step 6: Final answer
    x = 64,251.33

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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.