Home / 142,113.78-196,117.28-78,451.65

Finding the Fourth Proportional to 142,113.78, 196,117.28 and 78,451.65

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Solution

The fourth proportional to 142,113.78, 196,117.28 and 78,451.65 is: 108,263.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,113.78 : 196,117.28 = 78,451.65 : x
  2. Step 2: Convert to fraction form
    142,113.78/196,117.28 = 78,451.65/x
  3. Step 3: Cross multiply
    142,113.78x = 196,117.28 × 78,451.65
  4. Step 4: Simplify right side
    142,113.78x = 15,385,724,209.51
  5. Step 5: Solve for x
    x = 15,385,724,209.51/142,113.78
  6. Step 6: Final answer
    x = 108,263.42

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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.