Home / 142,552.58-196,728.74-78,890.40

Finding the Fourth Proportional to 142,552.58, 196,728.74 and 78,890.40

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Solution

The fourth proportional to 142,552.58, 196,728.74 and 78,890.40 is: 108,872.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,552.58 : 196,728.74 = 78,890.40 : x
  2. Step 2: Convert to fraction form
    142,552.58/196,728.74 = 78,890.40/x
  3. Step 3: Cross multiply
    142,552.58x = 196,728.74 × 78,890.40
  4. Step 4: Simplify right side
    142,552.58x = 15,520,008,595.64
  5. Step 5: Solve for x
    x = 15,520,008,595.64/142,552.58
  6. Step 6: Final answer
    x = 108,872.17

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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.