Home / 143,061.40-197,420.88-78,530.68

Finding the Fourth Proportional to 143,061.40, 197,420.88 and 78,530.68

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Solution

The fourth proportional to 143,061.40, 197,420.88 and 78,530.68 is: 108,370.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,061.40 : 197,420.88 = 78,530.68 : x
  2. Step 2: Convert to fraction form
    143,061.40/197,420.88 = 78,530.68/x
  3. Step 3: Cross multiply
    143,061.40x = 197,420.88 × 78,530.68
  4. Step 4: Simplify right side
    143,061.40x = 15,503,595,952.60
  5. Step 5: Solve for x
    x = 15,503,595,952.60/143,061.40
  6. Step 6: Final answer
    x = 108,370.22

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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.