Home / 143,248.21-197,688.03-78,720.16

Finding the Fourth Proportional to 143,248.21, 197,688.03 and 78,720.16

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Solution

The fourth proportional to 143,248.21, 197,688.03 and 78,720.16 is: 108,636.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,248.21 : 197,688.03 = 78,720.16 : x
  2. Step 2: Convert to fraction form
    143,248.21/197,688.03 = 78,720.16/x
  3. Step 3: Cross multiply
    143,248.21x = 197,688.03 × 78,720.16
  4. Step 4: Simplify right side
    143,248.21x = 15,562,033,351.68
  5. Step 5: Solve for x
    x = 15,562,033,351.68/143,248.21
  6. Step 6: Final answer
    x = 108,636.84

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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.