Home / 142,438.20-196,561.32-78,774.60

Finding the Fourth Proportional to 142,438.20, 196,561.32 and 78,774.60

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Solution

The fourth proportional to 142,438.20, 196,561.32 and 78,774.60 is: 108,707.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,438.20 : 196,561.32 = 78,774.60 : x
  2. Step 2: Convert to fraction form
    142,438.20/196,561.32 = 78,774.60/x
  3. Step 3: Cross multiply
    142,438.20x = 196,561.32 × 78,774.60
  4. Step 4: Simplify right side
    142,438.20x = 15,484,039,358.47
  5. Step 5: Solve for x
    x = 15,484,039,358.47/142,438.20
  6. Step 6: Final answer
    x = 108,707.07

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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.