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Finding the Fourth Proportional to 72,709.34, 100,338.64 and 42,488.62

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Solution

The fourth proportional to 72,709.34, 100,338.64 and 42,488.62 is: 58,634.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,709.34 : 100,338.64 = 42,488.62 : x
  2. Step 2: Convert to fraction form
    72,709.34/100,338.64 = 42,488.62/x
  3. Step 3: Cross multiply
    72,709.34x = 100,338.64 × 42,488.62
  4. Step 4: Simplify right side
    72,709.34x = 4,263,250,346.28
  5. Step 5: Solve for x
    x = 4,263,250,346.28/72,709.34
  6. Step 6: Final answer
    x = 58,634.15

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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.