Home / 72,875.16-109,319.04-20,285.28

Finding the Fourth Proportional to 72,875.16, 109,319.04 and 20,285.28

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Solution

The fourth proportional to 72,875.16, 109,319.04 and 20,285.28 is: 30,429.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,875.16 : 109,319.04 = 20,285.28 : x
  2. Step 2: Convert to fraction form
    72,875.16/109,319.04 = 20,285.28/x
  3. Step 3: Cross multiply
    72,875.16x = 109,319.04 × 20,285.28
  4. Step 4: Simplify right side
    72,875.16x = 2,217,567,335.73
  5. Step 5: Solve for x
    x = 2,217,567,335.73/72,875.16
  6. Step 6: Final answer
    x = 30,429.67

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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.