Home / 142,147.40-196,166.47-78,489.22

Finding the Fourth Proportional to 142,147.40, 196,166.47 and 78,489.22

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Solution

The fourth proportional to 142,147.40, 196,166.47 and 78,489.22 is: 108,316.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,147.40 : 196,166.47 = 78,489.22 : x
  2. Step 2: Convert to fraction form
    142,147.40/196,166.47 = 78,489.22/x
  3. Step 3: Cross multiply
    142,147.40x = 196,166.47 × 78,489.22
  4. Step 4: Simplify right side
    142,147.40x = 15,396,953,220.45
  5. Step 5: Solve for x
    x = 15,396,953,220.45/142,147.40
  6. Step 6: Final answer
    x = 108,316.81

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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.