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Finding the Fourth Proportional to 72,137.59, 108,698.79 and 59,278.03

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Solution

The fourth proportional to 72,137.59, 108,698.79 and 59,278.03 is: 89,321.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,137.59 : 108,698.79 = 59,278.03 : x
  2. Step 2: Convert to fraction form
    72,137.59/108,698.79 = 59,278.03/x
  3. Step 3: Cross multiply
    72,137.59x = 108,698.79 × 59,278.03
  4. Step 4: Simplify right side
    72,137.59x = 6,443,449,838.19
  5. Step 5: Solve for x
    x = 6,443,449,838.19/72,137.59
  6. Step 6: Final answer
    x = 89,321.67

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.